More stories

  • in

    The 10 Best Fuel Stabilizers to Buy 2020

    Picture this: you’ve bought yourself a beautiful old sports car and, like any good owner, have stored it out of the elements for the winter. You’ve also been careful to top-up all the fluids, remove the battery, and keep your vehicle in a moisture-free environment, so it’s in perfect condition for the spring.
    When the first warm day of spring arrives, you couldn’t be more excited to take your pride and joy for a spin, so you spend the morning getting it all ready and attempt to fire up the engine.
    But it won’t start.
    You try again and again, but the car won’t turn over, and you’re left wondering what possibly could have gone wrong.
    The answer is likely in the fuel.
    Whenever your sports car, or any other vehicle, sits without running for more than a month, it’s essential to use a fuel stabilizer to prevent the gasoline from going bad and clogging the fuel system. In this guide, we’ll look at the top fuel stabilizers on the market.

    Factors to Consider When Buying Fuel Stabilizers
    From the second you put fuel in your gas tank, it starts to degrade. Over a few months, the fuel can oxidize, forming gummy deposits that can clog up your fuel system and hinder your vehicle’s performance. It also makes the fuel less potent.
    Additionally, most modern gas contains ethanol, a corrosive material that can damage fuel lines, gas tanks, and carburetors. Ethanol also attracts water, another corrosive substance, from the atmosphere, doing further damage to your fuel system.
    Before looking at the best fuel stabilizers available today, you must know what to look for in a high-end product. After all, if the fuel stabilizer that you go with doesn’t last long enough or is too difficult to use, you won’t be happy with the result.
    Longevity
    Different fuel stabilizers last for different amounts of time, and the option you choose should generally depend on how long you wish to store your vehicle. As a rule, however, most reputable fuel stabilizers will keep your fuel in good shape for a year or two.
    As a result, you can store your car or other motorized equipment for up to 24 months without worrying about the fuel oxidizing or any ethanol present damaging the fuel system.
    Of course, you don’t necessarily need to choose an option that lasts for two years if you’re only storing your vehicle for a month or two at a time; the choice is up to you.
    How Much To Use
    The various fuel stabilizers on the market have different concentrations, affecting how much you’ll need to use in your car. The packaging instructions will let you know the approximate amount to allocate per gallon of fuel in your tank.
    Some brands have a chart on the bottle’s side, so very little math is required, while others tell you to use the entire bottle. It’s OK to go over this approximate amount by a bit, but not putting enough fuel stabilizer into your tank could make it less effective.
    Keep in mind that stabilizers with a lower concentration could end up costing you more, despite their lower sticker price, because you’ll have to put more in your tank than you would of a highly concentrated product.
    Size
    Hand in hand with the product’s concentration is the size of its bottle. Many top fuel stabilizers come in multiple sizes, allowing you to decide based on how much you need.
    For example, if you’ll be storing multiple vehicles, or wish to use the product in your lawnmower, string trimmer, motorhome, and car, you’ll want a larger bottle. Likewise, if you’re only applying the stabilizer to your motorcycle, a smaller bottle will suffice.
    Products with multiple size options make it easier to select a bottle that is right for you, especially since most fuel stabilizers have a shelf life of about two years after opening.
    Ease of Use
    If you’ve ever struggled to put oil in your car without spilling, you know how challenging it can be to pour things into your vehicle. The same can be said for fuel stabilizers, as you’ll have to get this liquid into your gas tank without making a huge mess.
    Some products have spouts that you can insert into the tank, and even have a measuring mechanism built into the bottle. If you aren’t a mechanic, selecting an easy-to-use fuel stabilizer should be a priority because it lessens the potential problems you could encounter.
    Other Considerations
    Many well-known brands have fuel stabilizers on the market, and, despite some of these products also cleaning your fuel system and engine, the end goal is always the same: to prevent your gas from going bad and clogging your fuel system.
    Generally, bad gas will prevent your engine from firing up, and in the worst-case scenario, could obstruct or damage your carburetor and fuel lines, forcing you to visit a mechanic. By putting a fuel stabilizer into your gas tank before storing your vehicle away, if even for a month, you can stop the gas from going bad.
    Here’s a look at the top fuel stabilizers available in 2020.

    Top 10 Best Fuel Stabilizers 2020

    1. Best Overall Fuel Stabilizer: Star Tron Enzyme Fuel Treatment

    View on Amazon

    Why we like it: Star Tron Enzyme Fuel Treatment helps vehicles fire up for the first time after lengthy storage by preventing a build-up in their engines.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: Eight ounces
    Easy to pour: Yes
    Longevity: Two years
    How much to use: One ounce per six gallons of gas
    Star Tron Enzyme Fuel Treatment is a top fuel stabilizer option because not only does it keep the gas in your tank fresh, but it can make old gas usable again. Yes, if you have old gas in a fuel tank or gas can, this treatment can bring it back.
    This product ensures that your vehicle will start up and run smoothly after lengthy storage and eliminates the need to drain your tank before storing your car for the season. The product is expensive when used as a fuel treatment because you’ll have to put some in every time you fill up, but an excellent option as a fuel stabilizer for the occasional user.
    Using the Product
    Star Tron Enzyme Fuel Treatment has a long spout, making it easy to pour into the gas tank without spilling. You’ll want to use one ounce of stabilizer for every six gallons of gasoline, and there’s a measurement guide on the side of the bottle showing you how much you’re putting into the tank.
    Remember, the frequency with which you use the product depends on your preferences. If you’re only using it for storage, you’ll measure the necessary amount and put it in your tank before storing the vehicle. Since the product also acts as a fuel treatment, you might re-administer it every time you fill your tank, as well.
    Verdict
    Overall, Star Tron Enzyme Fuel Treatment does an outstanding job of not only keeping fuel fresh but protecting the entire fuel system from damage. The main drawback is its price, as having to administer one ounce for every six gallons of gas adds up if you’re using it to treat your car after every fill. At the same time, its eight-ounce bottle is under $10 and can treat 48 gallons of fuel, making it a solid option for the annual user.

    Pros

    Keeps gas fresh
    Easy to pour
    Good for long-term storage
    Prevents fuel system problems

    Cons

    Small bottles
    Can get expensive

    2. Best Budget Fuel Stabilizer: STA-BIL Storage Fuel Stabilizer

    View on Amazon

    Why we like it: STA-BIL Storage Fuel Stabilizer comes in multiple sizes and does an excellent job of protecting your engine for up to 24 months.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: Multiple sizes between eight ounces and one gallon
    Easy to pour: Yes, except for the one-gallon jug
    Longevity: Two years
    How much to use: One ounce per 2.5 gallons of fuel
    Unlike other fuel stabilizers that also clean the fuel system, freshen up old gas, and improve your gas mileage, STA-BIL Storage Fuel Stabilizer has one job: to keep your gasoline stable. The good news is that this product is excellent at preventing your fuel from oxidizing and damaging your fuel system because it does this one job extraordinarily well.
    If you’ll be removing your car from storage to occasionally drive it or want something that’ll clean your fuel system while you go, you might look to another product like Royal Purple Max-Clean Fuel System Cleaner and Stabilizer. If you’ll be storing your vehicle for months at a time, or even up to two years, however, STA-BIL Storage Fuel Stabilizer is a great product.
    Using the Product
    STA-BIL Storage Fuel Stabilizer is incredibly easy to use because of its long spout. Keep in mind that the one-gallon jug doesn’t have this spout, making it more challenging to pour into your gas tank. The product also has measurement units built onto the side of the bottle, giving you a rough idea of how much you’re putting into the tank. To use the product, you’ll want to fill your tank at least 95% full before topping it up with fuel stabilizer and letting the engine run for five minutes.
    Verdict
    If you plan to let your vehicle sit for more than 30 days, STA-BIL Storage Fuel Stabilizer will ensure that your fuel stays fresh and doesn’t rust your carburetor. It’ll also protect your engine from gumming up and remove moisture from your gasoline, preventing corrosion. The main problem is that it takes one ounce of product to treat 2.5 gallons of fuel, so you’ll need a lot of it to protect an entire tank of gas.

    Pros

    Multiple sizes
    Excellent fuel system protection
    Keeps gas fresh for two years
    Easy to use

    Cons

    Need a lot of it
    Doesn’t clean the fuel system
    Only for fresh gas

    3. Best Premium Fuel Stabilizer: Lucas Oil Fuel Stabilizer

    View on Amazon

    Why we like it: Lucas Oil Fuel Stabilizer is a premium product that provides outstanding protection and will also clean your fuel system.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: Multiple sizes between eight ounces and one quart
    Easy to pour: Yes
    Longevity: 12 months
    How much to use: One ounce per one gallon of gasoline
    Lucas Oil is a big name in the car care industry, so it should come as no surprise that their fuel stabilizer is one of the best options on the market. This product does an outstanding job of preventing fuel from breaking down during storage and also cleans your fuel pump, compression rings, carburetor, and fuel injectors.
    Lucas Oil Fuel Stabilizer is a top product in this industry, with the one issue being the cost because, unlike long-term brands like B3C Fuel Solutions Ethanol Shield Stabilizer, it only lasts for 12 months, and you’ll have to use one ounce per every gallon of fuel.
    Using the Product
    One of the best aspects of Lucas Oil Fuel Stabilizer is its ease of use, as all bottles, even the one quart, come with an easy-pour spout. All you’ll do to use this product is pour it into a gas tank full of fuel and let the engine run for a few minutes before storing your car for the winter. You’ll likely need close to a full quart of stabilizer to treat a tank of gas, which might exclude you from using Lucas Oil Fuel Stabilizer on a large scale.
    Verdict
    Overall, Lucas Oil Fuel Stabilizer does its job exceptionally well and provides maximum protection for your engine and fuel system for about 12 months. While a year seems like a long time, this product doesn’t come close to the two-year or three-year storage capabilities of other brands. However, for short-term storage of a single vehicle, Lucas Oil Fuel Stabilizer is a premium option that’s worth considering.

    Pros

    Top-quality brand
    Makes old gas usable
    Cleans your fuel system

    Cons

    Only keep fuel stable for one year
    Uses one ounce per gallon

    4. Best Full Fuel System and Engine Protection: Sea Foam Motor Treatment

    View on Amazon
    Why we like it: Sea Foam Motor Treatment is more than just a fuel stabilizer, as it cleans and maintains your car’s engine.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 16 to 20 ounces
    Easy to pour: No
    Longevity: Two years
    How much to use: One ounce per gallon of fuel
    First and foremost, Sea Foam Motor Treatment is a product that cleans and lubricates various engine components like your injectors, carburetor, intake valves, and pistons. At the same time, you can use the product as a fuel stabilizer, as it prevents both gasoline and diesel from oxidizing and forming gummy deposits for up to two years.
    Keep in mind that when using this product as a stabilizer, its one ounce per one gallon of fuel ratio means you’ll need roughly two full bottles per tank of gas.
    Using the Product
    Unlike products with a long spout, Sea Foam Motor Treatment is a little more difficult to use because of its short neck. It comes in a shorter bottle because you’ll often use the product as an engine treatment and pour it directly into the crankcase. As a result, you’ll have to be careful when emptying it into your gas tank.
    You should also know that Sea Foam Motor Treatment is a liquid, despite its name, and will spill if you don’t take the proper care.
    Verdict
    Sea Foam Motor Treatment is an excellent choice for treating your entire fuel system as you drive or when seeking a product to use in both diesel and gasoline engines. The product works well as a fuel stabilizer, although it doesn’t live up to its full potential when you have the car in storage. To get the most of Sea Foam Motor Treatment, you’ll want to run your vehicle occasionally to let it do its thing. If your car will be sitting for weeks at a time between use, Sea Foam is worth picking up. If it spends months in storage, you might want to keep looking.

    Pros

    Cleans your engine
    Works in gasoline and diesel engines
    Has multiple formulations

    Cons

    Difficult to pour
    Not for car storage

    5. Best Multi-Purpose Fuel Stabilizer: Royal Purple Max-Clean Fuel System Cleaner and Stabilizer

    View on Amazon
    Why we like it: In addition to stabilizing fuel, Royal Purple Max-Clean Fuel System Cleaner and Stabilizer cleans the fuel system and can improve fuel economy and other engine problems.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 20 ounces
    Easy to pour: No
    Longevity: Seasonal storage
    How much to use: One ounce per gallon of fuel
    Much like Sea Foam Motor Treatment, Royal Purple Max-Clean Fuel System Cleaner and Stabilizer is a product that does some good for the entire fuel system. Royal Purple works on both diesel and gasoline engines and can improve your fuel economy, reduce your emissions, and restore your vehicle’s horsepower.
    As a fuel stabilizer, Royal Purple Max-Clean Fuel System Cleaner and Stabilizer can prevent the gas in your tank from going bad over the winter, so you won’t have to drain your tank before storing your vehicle. The issue with this product is that it’s best used as a fuel system cleaner, so you probably aren’t getting the most from it when using it as a stabilizer.
    Using the Product
    Royal Purple Max-Clean Fuel System Cleaner and Stabilizer comes in a 20-ounce bottle that doesn’t have an easy-to-pour spout. As a result, you’ll have to take some care to avoid spilling. The fact that the product only comes in a single size capable of treating 20 gallons of fuel means you might need multiple bottles if you wish to stabilize a full tank of gas.
    Verdict
    Royal Purple Max-Clean Fuel System Cleaner and Stabilizer is a great product that does everything that it’s supposed to do. If you’re just looking for a fuel stabilizer as someone who occasionally uses their car, this is one of the best options on the market. If your car goes into storage for months at a time without being used, a more specialized product like PRI Fuel Stabilizer might be your best bet.

    Pros

    Cleans your fuel system
    Great for occasionally-used vehicles
    Reduces emissions

    Cons

    Requires one ounce per gallon
    No easy-pour system
    Not for long-term storage

    6. Best Fuel Stabilizer For Diesel Engines: STA-BIL Diesel Fuel Stabilizer

    View on Amazon
    Why we like it: STA-BIL Diesel Fuel Stabilizer is a high-end product that’s made specifically for diesel engines.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 32 ounces or one gallon
    Easy to pour: Yes, in the 32-ounce option
    Longevity: One year
    How much to use: One ounce per five gallons when storing or ten gallons when operating the vehicle
    Although other products like Royal Purple Max-Clean work on diesel engines, STA-BIL Diesel Fuel Stabilizer is formulated for vehicles that run on diesel and one of the best in that role. This product prevents sediment and sludge from forming inside your engine, and also reduces oxidation and removes water from your diesel fuel.
    The key is that this product addresses problems related to ultra-low-sulfur diesel fuel (ULSD), the standard in North America, which can promote thermal fuel oxidation, corrosion, sediment formation, and lubrication issues.
    The drawbacks are that the product only protects the fuel for about 12 months, and you’ll have to reapply it every time you fill the tank when not using it for storage purposes.
    Using the Product
    The 32-ounce bottle of STA-BIL Diesel Fuel Stabilizer comes with an easy-pour spout that includes a measurement guide to ensure you’re using the right amount. This stabilizer size will treat 320 gallons of fuel when you’re occasionally running the vehicle or 160 gallons for storage. This 32-ounce bottle will cost you over $20, but it’s highly-concentrated, so you’ll get good bang for your buck.
    The one-gallon jug of STA-BIL Diesel Fuel Stabilizer isn’t as easy to pour into your tank because it doesn’t have the spout. The larger bottle also lacks the measurement units on the jug’s side, so you’ll have to ballpark or measure it when adding the product to your fuel tank.
    Verdict
    If you have a vehicle with a diesel engine, STA-BIL Diesel Fuel Stabilizer is a top choice because it is specially formulated to reduce the problems associated with ultra-low-sulfur diesel fuel. You don’t want to leave this fuel in your tank for months at a time without a fuel stabilizer that prevents it from taking on moisture, and this product is one of the best at this job. One bottle also treats a ton of fuel, but be aware that it only keeps diesel fresh for 12 months.

    Pros

    Reduces ULSD problems
    Treats a lot of fuel
    Simple to use
    Formulated for diesel

    Cons

    Only lasts for 12 months
    Have to use more of it when storing the vehicle

    7. Best Highly-Concentrated Fuel Stabilizer: PRI Fuel Stabilizer

    View on Amazon
    Why we like it: A little bit goes a long way with the highly-concentrated PRI Fuel Stabilizer.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 16 ounces
    Easy to pour: Yes
    Longevity: One year
    How much to use: One ounce per 16 gallons
    There’s a lot to like about PRI Fuel Stabilizer, as this product is industrial-grade, and you’ll only need to use one ounce of it for every 16 gallons of fuel, compared to one ounce per 2.5 gallons of fuel when using STA-BIL Storage Fuel Stabilizer. The result is that a 16-ounce bottle will last for years, although you should be aware that its shelf life is only three years from the time of opening and a bottle of it will run you somewhere in the $30 range.
    As far a performance goes, PRI Fuel Stabilizer is one of the best at restoring old fuel to usable condition, which could save you from having to empty a tank containing stale gas. You’ll also notice that this product prevents deposits from forming in your fuel system and can improve your fuel economy.
    Unfortunately, each treatment of the fuel only lasts for about a year. However, you can add another ounce or so of PRI Fuel Stabilizer to your gas tank annually to keep its contents fresh and prevent oxidation.
    Using the Product
    You shouldn’t have any trouble using PRI Fuel Stabilizer because its bottle comes with an easy-to-use spout that will measure the right amount for you. This spout works in half-ounce and one-ounce increments, allowing you to get as close as possible to the ideal amount of fuel stabilizer. It doesn’t take much to stabilize an entire tank of fuel, making this an excellent option for fleet owners or those with multiple vehicles they’ll be storing for the winter.
    Verdict
    As far as quality and ease of use go, PRI Fuel Stabilizer is a great option. Once you buy a bottle of this product, you won’t have to worry about re-purchasing for at least a few years, which should help you come to terms with the high upfront cost. You’ll also have to remember to add more stabilizer every year if you plan to store your car for a long time, but that’s a relatively rare issue.

    Pros

    Highly-concentrated
    Restores old fuel
    Protects your fuel system

    Cons

    Only lasts one year
    High cost

    8. Best Fuel Stabilizer For E10 Gasoline: Yamaha Fuel Stabilizer & Conditioner

    View on Amazon
    Why we like it: Yamaha Fuel Stabilizer & Conditioner is specially formulated for use with E10 gasoline, the most commonly used type in the United States.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 32 ounces
    Easy to pour: Yes
    Longevity: One year
    How much to use: One ounce per one gallon when storing; one ounce per three gallons when occasionally running
    Yamaha Fuel Stabilizer & Conditioner is formulated for E10 gasoline. What’s E10 gasoline, you ask? Well, it’s the type of gas you’ll find at most pumps in the United States and contains up to 10% ethanol. This information is vital because ethanol retains water, which can corrode elements in your fuel system.
    All of this is a fancy way of saying that this product will prevent ethanol-related problems when leaving gas in your tank, but it’s nice to know that it’s formulated for the exact gasoline that you’re probably putting in your car. You’ll likely have to use an entire bottle of this product to store a vehicle, making it an expensive choice.
    Using the Product
    A bottle of Yamaha Fuel Stabilizer & Conditioner comes with a long spout, making it an easy product to get into your gas tank. From there, it’ll keep your fuel stable for about a year, so your engine should start right up after being in storage for a season or two.
    Verdict
    You could say that there isn’t anything special about Yamaha Fuel Stabilizer & Conditioner, as it does the bare minimum that you’d expect from a fuel stabilizer. At the same time, it does this job relatively well, albeit at an inflated price compared to other options on the market.

    Pros

    Formulated for E10 gasoline
    Comes in a large bottle
    Reduces moisture-related problems

    Cons

    Lots needed for storage
    Only protects for one year

    9. Best Long-Term Fuel Stabilizer: B3C Fuel Solutions Ethanol Shield Stabilizer

    View on Amazon
    Why we like it: B3C Fuel Solutions Ethanol Shield Stabilizer can keep fuel fresh and usable for up to three years.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 24 ounces
    Easy to pour: Yes
    Longevity: Three years
    How much to use: One ounce per ten gallons of fuel
    B3C Fuel Solutions Ethanol Shield Stabilizer works by eliminating problems associated with ethanol fuels, such as moisture getting into the fuel system and causing corrosion. The product also lubricates and protects the top end of the engine and keeps gas usable for up to three years.
    You’ll be happy to learn that Ethanol Shield Stabilizer is highly-concentrated. Although it’s not concentrated to the level of PRI Fuel Stabilizer, you’ll only have to use one ounce for every ten gallons of fuel. Your 24-ounce bottle will last for years, making this a rare purchase for your household. There aren’t any extra here, as the product doesn’t clean your engine, and it’s pricier than other options, like STA-BIL Storage Fuel Stabilizer, but it’ll keep your fuel stable long-term.
    Using the Product
    The long neck on the bottle of B3C Fuel Solutions Ethanol Shield Stabilizer makes it simple to get into your tank without spilling. From there, you’ll want to run your engine for a short time to ensure that the product reaches all parts of your fuel system, especially your carburetor. Ethanol can attract water and clog up your fuel system, but this product prevents gummy fuel from becoming an issue by stopping the gas in your tank from breaking down.
    Verdict
    B3C Fuel Solutions Ethanol Shield Stabilizer is a product that has one job and does it well. If you’ll be storing your vehicle for more than a few weeks, and up to three years, this stabilizer will do what it’s supposed to without worry.
    You’ll want to look elsewhere if your fuel system is overdue for a cleaning, and you want an easy solution. However, if your fuel system is in good shape and you want to keep it that way without emptying your tank, Ethanol Shield Stabilizer can work for you.

    Pros

    Removes moisture from ethanol fuels
    Highly-concentrated
    Lasts for three years

    Cons

    Doesn’t clean the fuel system
    High upfront cost

    10. Best Fuel Stabilizer With Octane Boost: K100 MG All-In-One Gasoline Fuel Treatment & Additive

    View on Amazon
    Why we like it: K100 MG All-In-One does more than stabilize fuel, as it treats the entire fuel system and can provide an octane boost.
    Editor’s Rating:

    Quick Facts:
    Size of bottle: 32 ounces
    Easy to pour: Yes
    Longevity: Two years
    How much to use: One ounce per gallon
    K100 MG All-In-One Gasoline Fuel Treatment & Additive treats the entire fuel system, preventing phase separation and improving fuel performance. The end result is a better performing car with reduced emissions and a cleaner-running fuel system.
    There’s also the product’s octane boost capability, which can increase a fuel’s octane rating by as much as two points. While this doesn’t impact performance, it can prevent engine knocks caused by premature ignition in your car’s cylinders.
    As a fuel stabilizer, K100 MG All-In-One Gasoline Fuel Treatment & Additive can stop fuel from going bad for up to two years and bring back old gas to a usable state. You’ll have to use the entire bottle on a full tank of gas, making this an expensive option.
    Also, the product isn’t specialized for fuel stabilization, so it could be harder to get your engine started after lengthy storage than with a premium fuel stabilizer.
    Using the Product
    Like a lot of other products on this list, K100 MG All-In-One has a long neck that makes it easy to get into your gas tank. You’ll want to add it to your tank either before or after filling it with fuel. From there, the product’s composition allows it to easily mix with the fuel, moving it throughout the fuel system as the engine runs.
    An entire bottle is often required to treat a tank of gas. If you’re stabilizing a smaller amount of fuel, you can use its cap to measure, with eight caps equaling one ounce of fuel stabilizer.
    Verdict
    K100 MG All-In-One Gasoline Fuel Treatment & Additive is an excellent product that can do a lot of good for your vehicle’s fuel system. It can also stabilize stored fuel for up to two years, but other products on the market are more effective and economical when used solely as a fuel stabilizer.

    Pros

    Provides an octane boost
    Cleans your fuel system
    Brings back old fuel

    Cons

    Need to use lots of it
    Better as a fuel system treatment than a stabilizer

    Guide to Buying the Best Fuel Stabilizers
    With so many fuel stabilizers on the market, selecting the best one to meet your needs is a challenge. Here’s some additional information to help you make your decision.
    How Fuel Stabilizer Works
    A fuel stabilizer is a protective, petroleum-based substance that bonds to gasoline or diesel, preventing evaporation, oxidation, and chemical breakdown from occurring. The product also repels moisture that ethanol-based fuels can often absorb.
    Fuels with ethanol are widespread today and bond efficiently to water. As this reaction occurs, the gasoline turns into a gummy blob that sits on the floor of your fuel tank or, worse, moves throughout your fuel system, clogging its components. This process is called phase separation, and it ruins your gas, reduces its octane levels, and damages your engine.
    The chemicals in your fuel stabilizer work to prevent all of the negative aspects of fuel oxidation and water absorption, keeping your gas fresh and your engine free from the gummy deposits that this reaction creates.
    Why You Need a Fuel Stabilizer
    We know that, on the surface, you need a fuel stabilizer to protect your car’s fuel system, but why does the very thing your vehicle needs to operate damage its internal components?
    The answer is in the type of fuel we use today.
    About 98% of fuel sold in the United States contains ethanol, a renewable source that comes from plant-based materials called biomass. The vast majority of this fuel is called E10, which contains 90% gasoline and 10% ethanol. The idea is that ethanol causes less air pollution when burned. It also has a positive energy balance because its energy output is greater than the amount of energy it takes to create.
    Laws, including the 1990 Clean Air Act and the Energy Independence and Security Act of 2007, have provisions outlining and governing ethanol’s use in today’s gasoline.
    The problem is that cars aren’t designed to burn ethanol, and, as we’ve mentioned, this fuel causes all kinds of problems for engines and fuel systems. It also causes gasoline to break down faster, leading to the need for fuel stabilizers.
    Fuel Stabilizers in Diesel Engines
    For diesel engines, the need for a fuel stabilizer comes from the mandate for drivers to use ultra-low-sulfur diesel in their vehicles. The gist is the EPA has numerous laws in place that limit the amount of sulfur in the fuel you can buy.
    These laws have done an excellent job of reducing emissions, which is good because sulfur oxides are dangerous to the environment and a human health concern, but they’ve also changed the chemistry of diesel fuel.
    Hydrotreating, the process that removes sulfur from diesel, also eliminates the fuel’s natural lubricity compounds and makes it easier for it to absorb water. We’ve learned how dangerous water can be to fuel systems and engines, so using a stabilizer to bond to and remove this moisture is a good idea.
    Types of Fuel Stabilizers
    As you might have noticed, some products on this list will only stabilize your fuel and little else, while others will clean your fuel system or treat your engine, as well.
    So, which one is best for you?
    It all comes down to your reason for purchasing the product.
    Generally, standalone fuel stabilizers are the best for long-term storage because you won’t be driving the vehicle to capitalize on the benefits of the fuel system treatment. Since the products that include engine treatment are often more expensive, it makes sense to stick with the economical option that performs the exact job you’re seeking.
    At the same time, if you’ll continue to drive your car after using the fuel stabilizer, you might choose one that has these additional features because they’ll do your car’s engine components some good.
    The Lifespan of Gasoline and Diesel
    If you still aren’t sure if you need a fuel stabilizer for your vehicle, you should know how quickly gasoline breaks down. While there isn’t a definite amount of time that this process takes, gasoline containing ethanol can start to degrade within 30 days. After you’ve had gasoline sitting in your tank for over 30 days, the ethanol can start damaging your fuel system.
    Ethanol also loses its combustibility in less than three months, making it far more challenging to get your engine started. If you’re refilling your car less than once a month, a good fuel stabilizer is a necessity to prevent fuel system damage.
    Diesel, even today’s low-sulfur product, lasts a bit longer than gasoline, as you can keep it in your tank for about six months before it goes bad. At the same time, diesel can begin gumming up your fuel system in as little as 30 days, making a diesel fuel stabilizer a good idea.
    What Happens When Gas Loses Potency
    One of the symptoms of old gas is that it doesn’t burn as effectively, causing problems when trying to start your engine.
    Gas is a volatile product that goes through a refining process to give it the exact chemical composition it requires to work in your vehicle. The gas vaporizes in your fuel system, so your internal combustion engine can use it to power the car.
    The most volatile components in the gasoline, or the attributes that allow it to create the energy your vehicle needs, tend to evaporate over time. As these components evaporate, the gas burns less efficiently, making it difficult to start your engine.
    Fuel stabilizers can slow down this evaporation, so your gas doesn’t lose its potency as rapidly.
    Using Fuel Stabilizers on 2-Stroke Engines
    We’ve spent a lot of time going over how to use fuel stabilizers in your car, but what about other engines? Well, all of these products, except for STA-BIL Diesel Fuel Stabilizer, work in all two-stroke and four-stroke gasoline engines.
    As a result, you can use a fuel stabilizer in your lawnmower, string trimmer, motorcycle, dirtbike, or any other machinery that will have gasoline sitting in its fuel tank for more than a few weeks.
    STA-BIL Diesel Fuel Stabilizer is also for use in diesel generators if you have one that you occasionally use and are worried about the fuel quality.
    Can You Use Too Much Fuel Stabilizer?
    Since you’ll have to measure how much fuel stabilizer you’re putting into your tank, you might be worried about putting too much in and damaging your car.
    Using too much of these products isn’t usually a concern, however, as it’s close to impossible to “overdose” on fuel stabilizer, at least within reason. In fact, if you’re unsure about your measurements, you’re better off putting too much product into your gas tank than too little.
    Basically, too little fuel stabilizer could cause the product to fail, while too much won’t affect it whatsoever. You don’t want to fill your entire tank with the stuff, but it’s no big deal if you’re a little over the prescribed amount.
    Fuel Stabilizers in Stored Gas
    Much of this topic has focused on fuel left in your gas tank, and that’s because this fuel can actively damage your car. Fuel stabilizers are also useful if you’re storing some emergency fuel in a gas can or keeping some gas around to refuel your lawnmower in the summer.
    In this case, you’ll likely want a storage fuel stabilizer with the most extended shelf life because there’s no telling when you’ll actually use the gas. Of course, if you’ve bought a fuel stabilizer with fuel treatment capabilities for your car and have some leftover, it won’t hurt anything to use it in your stored gas can.
    Wrapping Up
    Your vehicles and other gas-powered equipment are valuable, and you want to do everything in your power to protect them from damage. Putting a little bit of fuel stabilizer into your tanks when your cars or tools will sit without being used can save you all kinds of hassle and repair costs, making it well worth the effort. For the best results, find the product that provides the coverage that meets your needs and keeps your engines and fuel systems in working order. More

  • in

    2021 Rolls-Royce Ghost Marks an Opulent Evolution

    When we look back on the late era of the internal combustion engine, the new Rolls-Royce Ghost may well prove to be the last sedan powered by a V-12 without hybrid assistance. This is a distinction that might be celebrated noisily, but 220 pounds of expertly applied sound-deadening material has other ideas. This is a car that never shouts and rarely does much more than whisper. It seemingly requires wide-open throttle to produce any evidence of internal combustion, and even then the V-12 merely issues a distant but purposeful hum of the sort you’d hear on the bridge of a luxury yacht a few seconds after moving the engine order telegraph to full ahead. Many brands will struggle to maintain their identities in the age of electrification, but for Rolls-Royce it will be a liberation from the small amount of disruption its engines still cause.
    Much about the new Ghost is familiar, for the simple reason that the first version became the brand’s best-selling model of all time over a decade-long run. The new car is slightly bigger and considerably cleverer but looks very similar from the outside. Exterior styling is cleaner and less fussy, Rolls reckoning it has identified what it terms a “post opulent” trend among the sharp-end one percenters who make up its clientele. But although more visually modest than the full-baller Phantom, the 218.3-inch, 5700-pound Ghost is never going to be short on presence, especially now that its rear-hinged second-row doors have gained power operation for opening as well as closing. It also gets the option of an illuminated radiator grille.

    View Photos

    Rolls-Royce

    Rolls-Royce Goes All In for the Last Ghost Zenith

    2021 Rolls-Royce Ghost Changed, Still Elegant

    Beneath the surface, all has changed. The first Ghost sat on the same underpinnings as the F01 BMW 7-series, but this one is based on the modular Rolls-only Architecture of Luxury platform that underpins both Phantom and Cullinan. Like its SUV sibling, the new Ghost gets both all-wheel drive and rear-wheel steering, with its 6.7-liter twin-turbo V-12 making the same output of 563 horsepower.
    Yes, it will hustle. Those Ghost buyers who will drive the car themselves—a clear majority in the United States—will be able to enjoy the surprising accelerative forces it is capable of generating. While never unseemly enough to chirp its tires, the Ghost will launch hard with the nose-up attitude common to the powerful but softly sprung. We didn’t confirm the claimed 4.6-second 60-mph time during our drive in the United Kingdom, but considering the nearly 400-pound-heavier Cullinan has beat that, we’re expecting the Ghost to be a bit quicker. It certainly seems quick enough. Steering is light and short on resistance, but front-end responses are accurate and grip levels are keen. An active anti-roll bar is fitted to the rear, but this is powered by a 12-volt motor (the Bentley Flying Spur has a 48-volt system), and the effect under harder cornering is limited. The brake pedal is weighted to make ultra-smooth stops easy and thus is also a little too soft for accurate modulation under hard braking.

    View Photos

    Rolls-Royce

    The Ghost is much happier at a gentler pace, with the most important statistic being the supine 1600 rpm at which the mighty engine attains its peak torque of 627 pound-feet. There is no way to manually select gears for the eight-speed automatic transmission, nor is there any obvious need to with the system software working as unobtrusively as an attentive valet. Just as in Phantom and Cullinan, the transmission uses GPS assistance to help intelligently select the right gear for approaching corners and junctions. Rolls-Royce is now happy to publicly state power and performance figures—it used to just claim an “adequate sufficiency”—but it still refuses to fit anything as vulgar as a tachometer to the instrument panel. Yet even with the Power Reserve meter showing more than 80 percent of the engine’s output untapped, performance is still brisk.
    At first, suspension settings feel too soft. The Ghost’s pillowy initial response to a bump feels as if it will be followed by the wallow of a ’60s land yacht, but the air springs and adaptive dampers arrest the seemingly inevitable counter heave. At higher speeds it turns into a true magic carpet, with a road-reading stereo camera system informing the dampers of upcoming undulations. There are also dampers fitted to the top control arms that are designed to counteract vibration. Even sizable compressions are digested without apparent effort, with snug sound insulation doing a similarly good job at stopping the too-real world from spoiling the tranquillity of the Ghost’s cabin. At 70 mph it is as quiet as most cars would be at 30 mph; conversations between front and rear seat can be conducted in a whisper. One strange omission is lane-keeping cruise control. The Ghost will keep distance from a car in front but doesn’t have active lane assist.

    View Photos

    Rolls-Royce

    The cabin is spacious, although slightly less roomy than you might expect given the car’s external dimensions. In regular form, the new Ghost is only barely shorter than the extended-wheelbase version of the outgoing car. Large adults can sit comfortably in the rear but without the ankle-twirling room that many associate with true luxury, a deficit that the inevitable stretched version will rectify. The combination of a high beltline and huge pillars also limits visibility, especially from the driver’s seat, where there are substantial blind spots to the front three-quarters and over the shoulder. We also noted that, at a regular seating height, only the top half of the Spirit of Ecstasy hood mascot can be seen, meaning the visible silhouette looks more like Dumbo than the Flying Lady.

    View Photos

    Rolls-Royce

    Rolls-Royce continues to deliberately make its cabins feel closer to the 1920s than the 2020s, with archaic details like mechanical-style rotary heater controls in place of the omnipresent digital climate readouts of every upmarket rival. For the Ghost, it has added individual digital instruments that look and behave exactly like the conventional dials they replaced. But the overall effect still feels entirely special, thanks to details like the perfectly weighted metal air vents and the beautifully stitched leather dashboard. Even the starry headliner—which uses hundreds of fiber optics to mimic a clear night sky—doesn’t feel like a gimmick.
    It is hard to criticize a car that betters a successful predecessor in every key regard, which is what the new Ghost manages. As ultra-luxury buyers follow the herd toward a preference for SUVs, it seems unlikely that this Ghost will be as popular as the outgoing version. But on every empirical and even subjective regard, it is the superior car.

    Specifications

    Specifications
    2021 Rolls-Royce Ghost
    VEHICLE TYPE front-engine, all-wheel-drive, 5-passenger, 4-door sedan
    ESTIMATED BASE PRICE $320,000
    ENGINE TYPE twin-turbocharged and intercooled DOHC 48-valve V-12, aluminum block and heads, direct fuel injectionDisplacement 412 in3, 6749 cm3Power 563 hp @ 5000 rpmTorque 627 lb-ft @ 1600 rpm
    TRANSMISSION 8-speed automatic
    DIMENSIONS Wheelbase: 129.7 inLength: 218.3 inHeight: 61.9 inTrunk volume: 18 ft3Curb weight (C/D est): 5700 lb
    PERFORMANCE (C/D EST) 60 mph: 4.3 sec100 mph: 10.4 sec1/4 mile: 12.7 secTop speed: 155 mph
    EPA FUEL ECONOMY Combined/city/highway: 14/12/19 mpg

    This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io More

  • in

    2021 Porsche Panamera 4S E-Hybrid Supersedes the Panamera Turbo

    Has the electric Porsche Taycan pushed the Panamera aside? Is the Panamera now redundant, archaic, and possibly even unnecessary? We’re here to say that the Panamera isn’t ready for its last rites.
    Evidence of that is the 2021 Panamera 4S E-Hybrid Executive. Like all Panameras, it is undergoing a mid-cycle refresh for 2021. The long name reflects all of the best features of the car. The 4 is for all-wheel drive, S stands for high performance, E-Hybrid tells you that it’s a plug-in hybrid, and Executive denotes the wheelbase stretch. Think of it as a limousine that ate a 911 Turbo, had a Toyota Prius Prime for dessert, and then was itself covered in Hershey’s chocolate syrup. It’s freakishly good.

    View Photos

    Porsche

    2021 Porsche Panamera Doubles Down on Power

    New Porsche Panamera Sets Record at Nürburgring

    The internal combustion side of the hybrid system is familiar. Under the hood is the corporate twin-turbocharged 2.9-liter V-6. It’s the same engine Porsche uses in versions of the Macan and Cayenne and that Audi bolts in, among other things, the S6 and S7 sports sedans. A 325-hp version of the 2.9-liter is now the standard powerplant in the base 2021 Panamera. In the new Panamera 4S E-Hybrid it has a more serious 443 horsepower and 405 pound-feet of torque.
    Between the new engine and its eight-speed dual-clutch automatic transmission, Porsche crams in the heart of the E-Hybrid system: a 134-hp electric motor. While 134 is a modest number of ponies, the motor also thumps along with 295 pound-feet of instant torque. The combination feeds the V-6 and the electric whizzer directly into the transmission. And it’s all good for 552 horsepower and a thumping 553 pound-feet of torque. If you’re checking our math, the motor and engine outputs don’t add up to 577 horsepower and 700 pound-feet of torque because the motor and engine don’t peak at the same rpm.

    View Photos

    Porsche

    Last year’s twin-turbocharged V-8-powered Panamera Turbo had a mere 550 horsepower. The 4S E-Hybrid replaces the discontinued Turbo in the 2021 Panamera line, though the monstrous new Turbo S with 620 horsepower and the even more insane Turbo S E-Hybrid stand at the top of the performance mountain.
    The Executive model has a wheelbase that is 5.9 inches longer than ordinary Panameras and stretches out a full 204.7 inches long. But the dimensions that announce the Panamera Executive’s presence are its 78.2-inch width and sleek 56.2-inch overall height. This isn’t a car that’s trying to hide its bulk.
    While the Taycan uses a floating gauge panel displaying the instrumentation, the Panamera’s centered tachometer and other gauges are still burrowed into the dash. The riot of control buttons that were a hallmark of the first Panamera’s cockpit were replaced by sleek touch-sensitive controls and a touchscreen in this generation, but even that seems like throwback tech compared to the Taycan.

    View Photos

    Porsche

    Though the Panamera is a big sedan, it seems far smaller than its Volkswagen Group chassis-mate, the Bentley Flying Spur, or any big Mercedes sedan. It would be better if the front doors were a bit longer to make it easier to get in and out, some of the controls may as well be marked with hieroglyphics, and in a car as elegant as this, we could do without the E-Hybrid’s lime-green badging and painted brake calipers.
    The E-Hybrid system’s battery pack has grown from 14.1-kilowatt hours to 17.9, and that 27-percent boost in capacity should be good for 18 miles of electric range. EPA ratings will be released closer to the on-sale date. That, however, misses what’s best about this hefty brawler. Put the 4S E-Hybrid Executive into Sport or Sport Plus, and all the resources go into the service of high-performance entertainment. Porsche claims it will, using launch control, slam to 60 mph in 3.6 seconds and thunder all the way to 185 mph. The short wheelbase version, says the company, will get to 60 mph a tenth quicker.
    With the electric motor’s instant low-end torque combined with V-6’s revving character, this isn’t what you might expect of a hybrid. With all the power funneling into the transmission, it feels like a seamless, heavily muscled battleship. Using the paddle shifters to great effect, the 4S E-Hybrid accelerates and responds like a vehicle weighing about a ton less than it does.

    View Photos

    Porsche

    Previous Panameras were always impressive at handling despite their mass but were remote in their feedback to the driver. This one, on the other hand, is nearly sports-car chatty. The revised damping and 21-inch wheels wrapped with Michelin Pilot Sport 4S summer tires, sized 275/35 up front and 325/30 in the rear, transmit just enough of the car’s movement into the driver’s butt to feel the tail tucking in or the nose taking a bite into a corner. It’s best in Sport and Sport Plus modes, but it’s even good when trawling in electric cruise. Porsche has also revised the electronic power steering’s assist map to add more effort just off center when the car is at speed.
    This particular example was equipped with adaptive sport suspension, 48-volt active anti-roll bars, and carbon-ceramic brake rotors. That the driver doesn’t notice all the computerized negotiation going on between the Panamera and the pavement doesn’t mean it isn’t going on. Porsche is effectively curating what sensations make it into the cockpit and which are filtered out.
    The computers are doing such a good job that sometimes this massive machine can briefly act like a 911. There always seems to be traction available, thrust to order, and chassis reflexes that would send an NFL cornerback to All-Pro. The gigantic brakes could stop aging.

    View Photos

    Porsche

    Porsche has done such a good job tailoring the driving experience that you might not want to ever sit in back. Yes, there’s plenty of legroom because of the wheelbase stretch and the command controls in the rear center console will satisfy all of your Jean-Luc Picard “Make it so” fantasies. But do you love your chauffeur so much that you’d hand over one of the world’s best sports sedans? Why would anyone want to deny themselves the pleasure of piloting this starship themselves?
    And that’s why the Panamera 4S E-Hybrid remains relevant despite the existence of the Taycan. While the Taycan delivers its own brilliant driving experience, it’s a different and quieter one than the Panamera’s. The Taycan simply can’t match the Panamera for the auditory and visceral joy that comes with its internal-combustion engine.
    The 2021 Panameras won’t make it to North America until next year; this Truffle Brown example was an early European-spec example. Look for official pricing to be announced right before the car goes on sale. Judging by the current price of a 4S E-Hybrid Executive, we’d guess that the 2021 model will open at about $150,000. That’s a large outlay of cash, but it slots nicely between the prices of the 522-hp Taycan 4S and the 670-hp Taycan Turbo S.

    Specifications

    Specifications
    2021 Porsche Panamera 4S E-Hybrid Executive
    VEHICLE TYPE front-engine, all-wheel-drive, 4-passenger, 4-door hatchback
    BASE PRICE (C/D EST) $150,000
    POWERTRAIN twin-turbocharged and intercooled DOHC 24-valve 2.9-liter V-6, 443 hp, 405 lb-ft; permanent-magnet synchronous AC motor, 134 hp, 295 lb-ft; combined output, 552 hp, 553 lb-ft; 17.9-kWh lithium-ion
    TRANSMISSION 8-speed dual-clutch automatic
    DIMENSIONS Wheelbase: 122.0 inLength: 204.7 inWidth: 78.2 inHeight: 56.2 inPassenger volume: 96 ft3Cargo volume: 14 ft3Curb weight (C/D est): 5200 lb
    PERFORMANCE (C/D EST) 60 mph: 3.3 sec100 mph: 9.4 sec1/4 mile: 11.8 secTop speed: 185 mph
    EPA FUEL ECONOMY (C/D EST) Combined/city/highway: 23/21/24 mpgCombined gasoline+electricity: 51 MPGeEV range: 18 miles

    This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io More

  • in

    Tested: 2021 GMC Yukon Denali Adds Refinement and Practicality

    In General Motors’s lineup of large SUVs, the GMC Yukon lives in the small bit of ground between the Cadillac Escalade and Chevrolet Tahoe. Like those trucks, the Yukon has been thoroughly redone for 2021. The new platform is still body-on-frame construction, but GM has finally bolted in an independent rear suspension to replace the old live-axle setup. That new suspension pays dividends in ride and handling and allows for a lower floor, which increases third-row space and cargo capacity.

    HIGHS: Modern suspension yields a spacious third row, strong engine choices, comfortable and improved interior, more space.

    The Yukon now has 11 cubic feet more cargo space than in the previous generation and 10.1 extra inches of third-row legroom. The wayback of the new Yukon still looks cramped, but dropping the floor makes the third row far more comfortable, and it’s possible to imagine that an adult would voluntarily spend up to an hour back there without complaint, especially if the second-row seats are scooted forward.

    View Photos

    Andi Hedrick

    Tested: 2021 Tahoe Z71 Has It Where It Counts

    We Choose and Spec Our Favorite GM Full-Size SUVs

    Ride and handling improvements born of the new suspension are subtler. The new Yukon steers, handles, and rides with more grace than before. But the front and rear suspension still clap annoyingly over impacts. The Yukon is easier to wield and responses are tighter, but we did note its obnoxiously low cornering grip—less than before—just matching the last Sierra HD pickup that we tested at 0.73 g.

    LOWS: Denali’s price spirals upward very quickly, Chevy’s Tahoe is essentially the same thing, intrusive stability-control system.

    Not everything about the Yukon is new, but not everything needed to change either. Unlike the Ford Expedition, which only comes with a twin-turbo 3.5-liter V-6, GMC continues to offer naturally aspirated V-8 engines. A 355-hp 5.3-liter V-8 is standard, and the upmarket Denali comes with a 420-hp 6.2-liter V-8. Both receive the advanced cylinder-deactivation system introduced by the 2019 Chevrolet Silverado. With the 6.2-liter V-8, our Denali hit 60 mph in 6.0 seconds, two-tenths of a second behind its predecessor. We saw 14 mpg during our time with the new Denali, which is in keeping with the EPA’s city fuel-economy estimate for a Yukon with this wheelbase and powertrain.

    View Photos

    Andi Hedrick

    As much as we love the V-8s, judged by how it well it works in the Sierra pickup, we might be tempted by the new turbocharged 277-hp 3.0-liter inline-six diesel engine with 460 pound-feet of torque. GMC hasn’t released fuel-economy estimates for the diesel, but based on the Sierra’s numbers with that engine we’d expect it will score roughly 23 mpg city and as high as 30 mpg highway. All three engines share a 10-speed automatic transmission and available with rear- or four-wheel drive.
    If you’re more into off-roading than drag racing, there’s the new AT4 trim, which adds off-road tires, skid plates, standard magnetorheological dampers, red front-tow hooks, and a variety of other cosmetic enhancements. When GMC began planning an AT4 trim for the Yukon, it expected the model to account for about 10 percent of sales, but the success of the Sierra and Acadia AT4 bumped expectations to about 20 percent.

    View Photos

    Andi Hedrick

    A new interior helps the Yukon satisfy its upscale pretensions, and Denalis go a step further with special leather, real wood trim, and a number of exclusive interior-color options. There’s an available 15-inch head-up display and optional tablet-style infotainment displays for the second row that can display media from a variety of bring-your-own video sources and—this may turn out to be a mistake—send navigation suggestions to the driver for approval.
    More practical and luxurious than before, the Yukon is a subtle choice compared to the overt ostentatiousness of the Cadillac Escalade and Lincoln Navigator. Buyers would be smart to consider Mercedes’s GLS-class full-sizer, but the Yukon’s design strikes us the sweet spot in GM’s lineup of large SUVs.

    Specifications

    Specifications
    2021 GMC Yukon Denali 4WD
    VEHICLE TYPE front-engine, rear-/4-wheel-drive, 7-passenger, 4-door wagon
    PRICE AS TESTED $83,795 (base price: $72,695)
    ENGINE TYPE pushrod 16-valve V-8, aluminum block and heads, direct fuel injectionDisplacement 376 in3, 6162 cm3Power 420 hp @ 5600 rpmTorque 460 lb-ft @ 4100 rpm
    TRANSMISSION 10-speed automatic
    CHASSIS Suspension (F/R): control arms/trailing armsBrakes (F/R): vented disc/vented discTires: Bridgestone Alenza A/S 02, 275/50R-22 111H M+S TPC SPEC 3156MS
    DIMENSIONS Wheelbase: 120.9 inLength: 210.0 inWidth: 81.0 inHeight: 76.5 inPassenger volume: 178 ft3Cargo volume: 26 ft3Curb weight: 6007 lb
    C/D TEST RESULTS 60 mph: 6.0 sec100 mph: 15.4 secRolling start, 5–60 mph: 6.4 secTop gear, 30–50 mph: 3.3 secTop gear, 50–70 mph: 4.1 sec1/4 mile: 14.5 sec @ 97 mphTop speed (governor limited): 112 mphBraking, 70–0 mph: 183 ftRoadholding, 300-ft-dia skidpad: 0.73 gStanding-start accel times omit 1-ft rollout of 0.4 sec.
    C/D FUEL ECONOMY Observed: 14 mpg75-mph highway driving: 20 mpgHighway range: 480 miles
    EPA FUEL ECONOMY Combined/city/highway: 16/14/19 mpg
    C/D TESTING EXPLAINED

    This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io More

  • in

    Tested: 2011 BMW 335i Coupe

    What Is It?
    For 2011, BMW’s sublime 335i coupe receives badly needed iDrive enhancements and a minor-league exterior refresh with new lights front and rear, plus a modified trunklid, grille, and front bumper. More significant, the car is now powered by the new N55 inline six-cylinder engine that has been deployed across the BMW lineup.
    How Does It Drive?
    Just like the old N54 engine, the N55 is as smooth as single malt, makes a sweet sound, and is plenty powerful. Also like the N54, it seems to make more than the advertised horsepower. Back in 2007, a twin-turbo coupe managed 0 to 60 in 4.9 seconds. This one did the deed in five flat. Through the quarter-mile, the earlier car managed 13.6 seconds at 105 mph versus 13.7 at 106 for this 2011 model. The 2011 pulls away beyond 100 mph, hitting that speed in 12.0 seconds (the 2007 needed 12.1), with a 1.8-second advantage to the hugely important-for-your-commute 140-mph mark (26.2 seconds versus 28.0).

    View Photos

    As the chassis remains unchanged, dynamic performance is identical to that of the previous car. Both stopped from 70 mph to 0 in 160 feet, and they recorded skidpad performances within 0.01 g of each other: 0.88 for the new, 0.87 for the old. The real difference came in mileage. The 2007 car had EPA city and highway mileage ratings of 17 and 26 mpg, respectively. The 2011 version improves to 19 and 28. Our observed figure improved even further, from 18 mpg overall in the 2007 model to 21 in the 2011.
    How Does It Stack Up?
    The 3-series coupe drives beautifully, with faithful steering, stout brakes, and fluid control feel. The six-speed manual has short, positive throws, and the chassis balance is terrific, with lots of power oversteer available in the lower gears. The new engine sounds slightly fuller than the old one, and the power delivery is even more linear: One can stick the car in sixth gear at ridiculously low revs, and it will pull from 30 mph on up without hesitation. The Audi A5 and the Infiniti G37 offer similar performance and style, but neither car has the fluidity and refinement of the BMW over twisting pavement.

    View Photos

    What’s the Cost?
    The rub, of course, is the price. BMW charges $43,525 for a base 335i coupe, although our tester was packed with just about every available option. Add in nav, the Sport package with 19-inch wheels and tires, the Premium package, and parking sensors—among other items—and the sticker swells to $53,525. That price will plant a person into a lot of cars, from a sexy Audi S5 to a boisterous Chevy Corvette, but there’s nothing that matches the blend of refinement and performance provided by a 335i—two turbos or one.

    View Photos

    Specifications

    SPECIFICATIONS
    2011 BMW 335i Coupe
    VEHICLE TYPE Front-engine, rear-wheel-drive, 4-passenger, 2-door coupe
    PRICE AS TESTED $53,525 (base price: $43,525)
    ENGINE TYPE Turbocharged and intercooled DOHC 24-valve inline-6, aluminum block and head, direct fuel injectionDisplacement: 182 in3, 2979 cm3Power: 300 bhp @ 5800 rpmTorque: 300 lb-ft @ 1200 rpm

    TRANSMISSION 6-speed manual
    DIMENSIONSWheelbase: 108.7 inLength: 181.9 inWidth: 70.2 inHeight: 54.1 inCurb weight: 3506 lb
    C/D TEST RESULTS Zero to 60 mph: 5.0 secZero to 100 mph: 12.0 secZero to 130 mph: 21.3 secZero to 150 mph: 32.7 secStreet start, 5-60 mph: 5.5 secStanding ¼-mile: 13.7 sec @ 106 mphTop speed (governor limited): 156 mphBraking, 70-0 mph: 160 ftRoadholding, 300-ft-dia skidpad: 0.88 g
    FUEL ECONOMYEPA city/highway driving: 19/28 mpgC/D observed: 21 mpg

    This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io More

  • in

    Tested: 1986 Chevrolet Corvette Convertible

    From the February 1986 issue of Car and Driver.
    The editorial “we” has shuttled between enchantment and annoyance so many times on the Corvette since its 1984 re­design that our tests read like soap-opera scripts. Is this the most advanced produc­tion car on the planet, as we once asserted, or an aluminum-and-fiberglass reincarna­tion of Judas Iscariot, as we later intimat­ed? Stay tuned for the next thrilling epi­sode as “we” neatly dodge the issue by saying, “Boy, it’s sure a lot better than it was last year.”

    Corvette Chronology 1980s

    1989 Chevrolet Corvette Convertible Road Test

    There should be no arguing over this latest assessment, for two reasons. For 1986, after a ten-year absence, a convert­ible version will once again be available. If you like convertibles, hallelujah! If you don’t, the coupe continues as before.
    The second reason to rejoice is the Bosch-derived anti-lock brake system, which is now standard on both body styles. The stopping distance from 70 mph is only 164 feet, the second shortest we’ve ever measured for a production car.
    We’ll come back to this headline stuff af­ter a rundown of the news. Starting in Feb­ruary or March, both the convertible and the coupe will have aluminum cylinder heads as standard equipment. Although this change was originally intended for the start of the 1986 model run, a few design details had to be revised at the last mo­ment, resulting in a delay. The heads do more than just save 40 pounds per car, though this is no small thing in itself. They also contribute to engine efficiency, thanks to the spark plugs’ being more centrally lo­cated in the combustion chambers and to larger intake ports. And the compression ratio has been raised half a point, to 9.5:1—a typical change in the transition from iron to aluminum heads because of the faster heat transfer of aluminum.

    View Photos

    DICK KELLEY

    Professional car thieves should have special interest in VATS, the new Vehicle Anti-Theft System, which is also standard equipment. Everyone will notice that the new ignition key has a black pellet inserted in the top of the blade just after the grooves and notches fade out. Anyone who tries to start a new Corvette without the right pellet in his key will notice a lot of cranking but not much starting. This pellet is the resistance module—Chevrolet has fifteen to choose from—and the ignition switch reads it along with the normal grooves and notches. If the key reader doesn’t like the proffered pellet, it tells the electronic control module to deactivate certain parts of the fuel system (thieves read this magazine too, so the less said about which parts, the better) for about two minutes. Therefore, a thief deter­mined to use a key instead of a tow truck might have to shuffle little black pellets for as much as a half-hour before finding the right one. And the ordinary thief, Chevro­let says, thinks anything longer than ten minutes is working overtime. So there’s a reasonable chance he’ll ignore your Cor­vette, go on down the street, and pick out a nice Porsche instead.
    Said thief will be missing out on a few other 1986-model changes. An upshift id­iot light sits in the upper left corner of the tachometer. The whole instrument cluster has been slightly reangled to reduce glare. And a center-mounted brake light has been incorporated—at the top of the rear window on the coupe, at the top of the tail­light panel on the convertible.
    So much for details. Now back to the headlines. The convertible, clearly a nice piece of work, is a joint venture between Chevrolet and ASC, and it entailed far more than just peeling the top off of the coupe. The car’s frame is considerably re­vised, in part by adding stiffness (including an X-brace under the cockpit floor), in part by reengineering sections of the original structure. The result is a convertible uncommonly free of creeks and groans, particularly when you consider its stiff suspension. The few aftershocks you feel in the structure when you’ve passed over a bump are of high frequency–by itself, a good indication of stiffness–and they damp out quickly. Certain trim pieces quiver and rustle for a longer time, but they do that in the coupe, too.

    Complete History of the Chevy Corvette

    Chevy Corvette: A Brief History in Zero-to-60-MPH

    Our subjective conclusions about chas­sis stiffness are confirmed by Corvette en­gineers, who say that the convertible is not as rigid as the coupe when the latter’s roof panel is in place, but it’s better than the coupe with the panel removed. (This con­clusion may soon have to be revised, though, because the engineers are consid­ering adding the convertible’s reinforce­ment package to the coupe.)
    The convertible’s roof, and its system of stowing, continue very much in the Corvette tradition. Two toggles release the folding top from the windshield header. Unlatching two tapered pins below the rear window releases the rear attachment. Then you lift the rear of the roof to allow the rear-hinged deck panel to swing open. In effect, the trunk then swallows the top, leaving no trace of it once the deck panel is returned to its place and latched. (There is still room in the trunk for a good-sized suitcase under the folded top.)
    Except for four electric latches at the rear (two to release the top and two to al­low the deck panel to open), all of the fold­ing and swinging are accomplished man­ually, but the efforts are hardly worth mentioning. Getting out of the cockpit is the hardest part.
    Back on the road, you’ll find a top-down Corvette to be a mighty hospitable car­riage. When there’s no crosswind, air flows smoothly around the occupants’ heads, with no buffeting of their ears and with only modest tousling of their coiffures. New for 1986, on both the convertible and the coupe, are plastic fairings between the windshield pillars and the side mirrors; they do much to smooth out the airflow across the window openings. They are hardly things of beauty when viewed from the cockpit—you see inside them, which is rather like looking under a fender-but at least they are functionally elegant.
    The swept-back form of the windshield provides a pocket of still air just behind the glass, but the gradient of air speed rises quickly as you measure back from the vi­sors. By the time you reach the headrests there is a stiff breeze, but the flow is smooth rather than turbulent and there­fore is not unpleasant.
    The convertible’s only serious annoy­ance exists only when the top is up: the rear quarters are so wide that they block the view to the corners. Visibility is so bad that you have to approach crossroads per­pendicularly, no matter what angle the in­tersection, just so you can get a decent view of oncoming traffic.
    Corvette engineers say there is no weight difference between the coupe and the convertible. Maybe that shouldn’t be a surprise, because the huge glass terrarium on the back of the coupe could have been traded for a lot of steel reinforcements. It could also have been traded for a small glass window in the back of the convertible top, but Chevrolet took the easy way out by using plastic film-the kind that gets foggy in a few years. Our test car weighed 3266 pounds, within a few pounds of previous coupes with similar options. In any case, we see no reason to disagree with the engi­neers: with all the additions and deletions taken together, the ’86 model, coupe or convertible, weighs virtually the same as the ’85.
    Radical surgery of the type that pro­duces a convertible usually has a negative effect on ride quality. The engineers went to work to avoid any such deterioration, and the result is that the convertible has its own package of springs, bars, and shocks. The convertible’s front spring rate is 3 I 0 pounds per inch, compared with 295 for the coupe. Both have 228-pound-per-inch springs in back and 26mm tubular front anti-roll bars. The convertible’s 19mm rear bar, however, is smaller than the coupe’s, which is 20mm. (In comparison, the coupe’s Z5 l handling option has 380-pound-per-inch springs in front, 330 in back, a 30mm solid front anti-roll bar and a 22mm solid rear bar.) Shock-absorber cali­bration is different for each model.
    The convertible also departs from GM’s usual 35-psi recommendation for tire pressure: its placard calls for 30 psi. This is purely a ride consideration. Corvette engineers admit that nothing bad will happen to the coupe owner with ride complaints if he deflates accordingly, though they can’t officially advise around the official recom­mendation, if you follow the logic here.
    Interestingly enough, the convertible has the wide, 9.5-inch wheels of the Z5 l as standard equipment, which suggests that they have a beneficial effect on ride. Obvi­ously, they don’t hurt skidpad adhesion: at 0.85 g, this car’s performance is not signifi­cantly different from past Corvettes’.
    In fact, except for the folding roof, this new Corvette continues much as before. Acceleration is about the same; top speed is down a few mph, to 144, probably be­cause of greater aerodynamic drag over the convertible top. Braking is noticeably better for one or two moderate-speed stops now that the anti-lock system is in place, but the Corvette still shows some fading tendency when the brakes are used aggressively at high speeds. We don’t think this will be particularly noticeable in typical American driving-most buyers will probably instead be enthralled by the new anti-lock system-but Chevrolet has some work to do if it expects to match the best brakes available from Porsche and other European makers.
    Keen observers will notice that a new logic is operating the manual transmis­sion’s electric overdrive. Previously, one flick of the switch would lock out the over­drive forever. Now, if the engine has been off for more than ten seconds or so, the overdrive will automatically be engaged when the engine is started again. If the driver wants it out, he has to lock it out each time he starts the engine. Corvette engineers were afraid the old system would be considered a “defeat device” by the EPA; with overdrive engaged, fuel economy is improved by 2.5 mpg in the combined test, enough to escape the gas­guzzler tax.
    Escaping the tax takes on new impor­tance with the convertible. Its price has not been announced at press time, but Chev­rolet spokesmen estimate a $4000-to-­$5000 increment over the coupe’s price, which means a window sticker solidly in the $30,000 range when the usual options are figured in. That’s serious bucks.
    And it brings up a serious question. Could a couple of drifters with no visible means of support afford to cruise Route 66 in a Corvette convertible today, the way they did on TV two dozen years ago? May­be the question is moot, because Route 66 doesn’t exist anymore. The federal gov­ernment, figuring that Interstates handle the traffic now—and, who knows, maybe figuring there would never be another convertible Corvette—decommissioned that famous old highway a few months back, replacing the “66” signs with local route numbers.
    So the Corvette convertible is returning to a changed world. The TV networks wouldn’t go with Tod and Buz anymore, either. Today’s adventurers would be Chip and Buffy, and they’d probably drive an automatic.

    Specifications

    This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io More