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Best Fuel Stabilizers for 2023 – 5 Picks that actually work!

It is obvious that fuel is a vital component of your vehicle's daily operation. But the problem is that most people do not realize how harmful fuel can be for the engine if it is left to sit for an extended period of time. But why?

Fuel consists of various volatile compounds that, over time, start oxidizing and evaporating, causing damage to your engine and fuel system. To prevent that, you should consider adding a high-quality fuel stabilizer to your vehicle's tank. This will, for sure, allow you some peace of mind while your car is stored in a garage for several months.

That is why in today's article, I will introduce the best fuel stabilizers on the market and some of the most frequently asked questions considering the usage of these products.


In a Hurry? The Winner after 41 Hours of Research:

STA-BIL Storage Fuel Stabilizer - Keeps Fuel Fresh for 24 Months - Prevents Corrosion - Gasoline Treatment that Protects Fuel System - Fuel Saver - Treats 80 Gallons - 32 Fl. Oz. (22287)

Our Rating: 96/100

Why it is the best?

  • This product comes from one of the most trusted brands available on the market
  • Works for 2 and 4 cycle engines
  • It offers you a versatile use since you can use it for cars, marine vehicles, lawnmowers, as well for snowblowers
  • Provides a smooth start for your engine even after months spent in the garage
  • Suitable for stabilizing gas and ethanol-based fuels
  • Affordable

How I Picked:

14 Resources 

203 Reviews Compared

41 Hours Of Research 

33 Popular Products Considered

Last Updated: February 02, 2023

By James Ruhle: This article has been updated to reflect the most accurate information regarding best fuel stabilizers available for those who are interested in having great fuel performance. The best 5 available have changed, and information has been added to assist individuals in finding the best fuel stabilizers currently available on the market. The FAQ has also been updated.


Current Top Fuel Stabilizers On The Market- Comparison Table

Product

Size

Type

Our Rating

Current Price

STA-BIL Storage Fuel Stabilizer - Keeps Fuel Fresh for 24 Months - Prevents Corrosion - Gasoline Treatment that Protects Fuel System - Fuel Saver - Treats 80 Gallons - 32 Fl. Oz. (22287)

32 Oz.

Gasoline and ethanol-based fuel

96/100

STAR BRITE Star Tron Enzyme Fuel Treatment - Concentrated Formula 8 Ounce - Treats 128 Gallons - Fuel Stabilizer & Treatment, Gasoline Stabilizer, Star Tron Marine Enzyme Fuel Treatment (093008SS)

8 Oz.

Gasoline and ethanol-based fuel

89/100

Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart

32 Oz.

All types of fuel

92/100

32 Oz.

Gasoline and ethanol-based fuel

92/100

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce

20 Oz.

All types of fuel

80/100

Best Fuel Stabilizers On The Market- Individual Reviews

As said, engine fuel contains volatile compounds that can easily evaporate and oxidize when your fuel sits unprotected for too long in the gas tank. But the bigger problem is that the oxidation creates new compounds which can cause some serious damages to your engine.

Therefore, it is crucial to prevent fuel deterioration by using the best fuel stabilizers. In short, a fuel stabilizer is a chemical compound that prevents oxidation from occurring, and that way, it maintains fuel fresh and clean for longer periods of time.

If you bought and used the best fuel stabilizer, your fuel should stay fresh for approximately 24 months. But considering there are so many of them available on the market to choose from, it is obvious you will need some help.

So here, you are looking at a list of the best performing fuel stabilizers that I had a pleasure to use and test for you.

1. STA-BIL 22214 Fuel Stabilizer - Editor’s Choice

STA-BIL Storage Fuel Stabilizer - Keeps Fuel Fresh for 24 Months - Prevents Corrosion - Gasoline Treatment that Protects Fuel System - Fuel Saver - Treats 80 Gallons - 32 Fl. Oz. (22287)

Our Rating: 95/100

Sta-Bil 22214 fuel stabilizer is one of the best stabilizers available on the market nowadays for the given price tag. 

Nurturing your vehicle is essential to ensure a smooth and efficient ride. This specially formulated fuel additive shields you from the hassle of draining old fuel out of 2 or 4-cycle engines, while also protecting against corrosion by removing water particles in the tank. It even cleanses carburetors (great for older models) and injects life into an otherwise aging engine by cleansing debris within its pathways - giving new purpose!

Well, if you plan to store your vehicle that runs on gasoline and ethanol fuel blends, during the winter season for over a month or two, the 22214 fuel stabilizer will keep the fuel fresh. In fact, it can keep fuel fresh for up to 24 months! This fuel stabilizer will allow you to start up your engine quickly and easily even after months of rest in the storage.

You can also use this fuel stabilizer for marine vehicles, lawn mowers, collector cars, snow blowers as well generators. You can be sure this product will protect your engine from gum, varnish, rust, and corrosion, and will prevent the evaporating of the fuel based on ethanol.

Sta-Bil fuel stabilizer offers great protection for gas-powered vehicles; however, there are a few scenarios where it is not suitable. That includes needing to improve your vehicle's gas mileage or if you have an engine running on diesel fuel – in those cases other options should be sought out.

Pros

  • Affordable
  • Prevents varnish and evaporating
  • Suitable for gas and ethanol-based fuel
  • Provides a versatile use since you can use it for cars, marine vehicles, lawnmowers, snowblowers
  • Will keep your fuel fresh for up to a 2 years
  • Maintain carburetors and fuel injectors clean
  • Guarantee easy and quick start

Cons

  • Not compatible with diesel engines

Corroseal Water-Based Rust Converter Metal Primer, Rust Converter - 1 Gallon

Our Rating: 89/100

The Star Tron Enzyme Fuel Treatment features a unique enzyme technology especially crafted to work great for both gasoline and ethanol fuel. It is compatible to use in your daily vehicle as well as in a vehicle that you plan to keep stored for several months. 

The formula will prevent ethanol fuel from evaporating as well from phase separation by simply breaking down excess water and sludge if there are any smaller particles left by any chance it will be safely burned up when you run your engine. 

Tired of dealing with a sluggish vehicle? This formula will help you restore your trusty ride to peak performance. It can remove common contaminants like carbon deposits, corrosion, varnish and gums from fuel injectors as well as carburetors -- making it easier for gas mileage improvement while reducing emissions! So get ready - the cleaner fuel system means faster acceleration and prolonged engine life just in time for those summer road trips ahead.

This additive will allow you to store your vehicle for up to several months during winter, and it can keep your fuel fresh and stable for up to 2 years. You can be sure your engine will run smoothly even after it was not active for a prolonged period of time. 

Since the formula is very concentrated, just 8 ounces of it will be enough to stabilize 128 gallons of fuel, making this product a very economical choice.

There are few things that are troublesome such as a bottle design. You will not be able to pour it out properly without using the funnel. Also, Star Tron fuel stabilizer, as well as the STA BIL product, is not suitable to use with an engine that runs on diesel fuel.

Pros

  • Suitable for gasoline and ethanol-based fuel
  • Reduce emissions
  • Works great for seasonal storing as well for daily use
  • Reduce oil usage and stabilize oil temperature
  • Prevents evaporation and varnishing
  • Concentrated formula makes this product economical
  • Keeps fuel stable and fresh for up to 2 years

Cons

  • Awkward bottle design makes pouring tricky without funnel
  • Not compatible with diesel engines

Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart

Our Rating: 92/100

The Lucas 10001 fuel stabilizer is 100% based on petroleum, so you can be sure you can safely blend it with other additives such as mineral oil, ATF, or synthetic lubricants. It is safe for all types of engines, including diesel ones. Regular use will increase both the power of the engine and gas mileage. 

As a matter of fact, the manufacturer claims that this product will improve the lifespan of your engine at least 50% and probably even more. This is one of the few products that actually reduce oil consumption while at the same time, enhance miles and power per gallon.

Our fuel and oil stabilizer is the perfect choice for small cars, SUVs, CUVs, trucks, and pickup trucks. It's also an ideal solution to keep your lawnmowers snowblowers air compressors running like new after storage periods - eliminating dirt clogs gunk carbon build-up while ensuring excellent lubrication stability of temperatures plus sealing surfaces from further damage! And not to worry; all materials are safe with seals & rubbers yet powerful enough to stop any pesky leakage issues you may have had before.

Since it will reduce mechanical friction and dry starts, you can expect that your engine will run quietly without risk of wear and tear. This product is suitable to use with both new and old engines. But there are few downsides. The first one is that it won't do a good job with some new models of engine and the second one is that old engines will need permanent and regular use which can be very expensive at the end. 

Pros

  • Safe for all types of fuel
  • 100% petroleum formula
  • You can blend it with ATF, mineral oil, and synthetic lubricants
  • Reduce oil usage and stabilize oil temperature
  • Prevents evaporation and varnishing
  • Stabilize engine function and enhance its durability
  • Increase oil pressure

Cons

  • Not compatible with some new engines
  • Might be to expensive option for old engines

Yamaha ACC-FSTAB-PL-12; Fuel STABILIZER Plus; ACCFSTABPL12 Made by Yamaha

Our Rating: 92/100

Yamalube is a fuel stabilizer and conditioner that comes from a reliable motorcycle brand Yamaha. They designed this original OEM alcohol-free formula to stabilize and condition explicitly E10 gasoline.

The formula is alcohol-free, so it is ideal for use in both 2 and 4 stroke engines. Once applied, the formula helps protect fuel system components made from metal and aluminum. It will as well protect your fuel system from ethanol fuel rust and corrosion, which is a serious and unfortunately widespread problem in many engines.

Since it is alcohol-free, it also prevents phase separation, the buildup of varnish and gum, and even fuel oxidation and evaporation. This will keep your engine clean as new, further enhancing the engine's efficiency and overall gas mileage. You can be sure your engine will run smoothly and quietly, no matter how long it was left to sit in the garage. 

Invest in a bottle of this powerful fuel conditioner and stabilizer to power up five gallons of gas-run engines, such as cars, lawnmowers, or generators. A 32 oz concentration can keep your fuel fresh for two years even during the toughest winter conditions – making it an excellent choice when compared with other brands that aren't Diesel compatible.

Although there is a cost associated with purchasing it – highly effective results from using this product make any extra upfront costs worthwhile!

Pros

  • Serve as a fuel stabilizer and conditioner
  • Suitable to use with both 2 and 4 strokes engine
  • Works perfectly with E10 gasoline
  • Suitable to stabilize ethanol fuel
  • Prevents evaporation and varnishing
  • Protects fuel system from corrosion and phase separation
  • Concentrated formula
  • Improve engine efficiency as well as gas mileage

Cons

  • A bit too pricey
  • Not suitable to use with diesel engines

Royal Purple Max-Clean Fuel System Cleaner and Stabilizer 11722 20 Ounce

Our Rating: 80/100

This Royal Purple 11722 fuel stabilizer grows more popular from day to day among car fanatics. It is also very well known as the best fuel stabilizer for motorcycles. This fuel additive will stabilize any motorcycle fuel regardless of the type with its highly effective 3-in-1 function.

Those functions include a reduction in carbon deposits and other emissions, it will also restore and improve the fuel economy for at least 3.2 percent, and it will increase the horsepower for an average of 2.6 percent. 

Royal Purple 11722 offers unprecedented compatibility for all types of engines – diesel, gasoline & ethanol blends. With this product, you'll enjoy continuous smooth engine operations even after prolonged periods in storage! Moreover, it prevents stalling, evaporation, and phase separation while combating varnishing as well as corrosion too - making it the best fuel stabilizer around to keep your motor running at its optimum performance.

But that is not all this fuel stabilizer will improve your vehicle's performance by keeping your fuel system clean and well protected. This will, of course, lead to the improvement of overall gas mileage. There is one downside, though, and that is how expensive it is to use this fuel stabilizer on a regular basis, considering that the bottle of 20-ounces can only treat 20 gallons of fuel.

Pros

  • Suitable for all types of fuel
  • Works perfect for motorcycles
  • Improve the fuel economy as well as the horsepower
  • Prevents evaporation and phase separation
  • Reduce carbon deposits and other emissions
  • Increase the output of the engine

Cons

  • Expensive to use on a regular basis since 1 oz can be used to treat 1 gallon of fuel

Best Fuel Stabilizer FAQ

Is Sea Foam a good fuel stabilizer?

The most important thing to realize is that not even one product on the market is a fix-it-all solution. Also, as you saw it usually diesel fuel engines require specially designed products to keep them working properly. 

Fortunately, Sea Foam fuel stabilizer is compatible to use with both gasoline and diesel engines. But just like with all products, you must follow the instructions for optimal usage. If you use too much of this particular fuel stabilizer, you will over dilute engine oil, which is not good at all.

So let’s repeat once more, follow the directions, and your car will, for sure, benefit from this product.

What does a fuel stabilizer do?

Fuel poses an interesting conundrum: it can quickly turn stale when left unattended. A surprising discovery reveals that gasoline deteriorates within just one month if not carefully sealed off from oxygen and other environmental factors, so take the necessary precautions to keep your fuel fresh!

The car’s fuel system is not airtight, so you will need to protect your fuel in some other way. When a vehicle is driven, the gasoline burns up before it begins to evaporate and deteriorate. But when you plan to store your vehicle for several months, you must protect your fuel from evaporation, and that is where fuel stabilizers can help you a lot.

On the other hand, fuel stabilizers do not play any prominent role in everyday life. However, they can still enhance the performance of your engine so you may consider using it regularly.

Do fuel stabilizers really work?

It's important to keep an eye on the freshness of your gasoline — after all, it is a combustible blend of chemicals that can break down over time when exposed to oxygen and moisture. This oxidation process occurs no matter whether you store your vehicle with a full tank or not as air will still find its way in.

Modern gasoline is at greater risk because it contains a high percentage of ethanol, which is very potent for attracting and absorbing water, which only accelerates the breakdown of fuel.

Depending on the quality of your fuel in a period of three to six months, the process of oxidation will start to deteriorate gasoline to the point where it becomes a sticky, varnish-like liquid that is no good at all.

But the worst part is that it will clog your fuel system as well as gum up your pump, injectors, and tank. Well, this scenario will happen if you do not use the best fuel stabilizer for your type of engine.

Fuel stabilizer is a reliable and most inexpensive insurance you can acquire when planning long term storage of your car, motorcycle, truck, or some small-engine tool such as a lawn mower. Adam from MotoNation says that motorcyclists need to use fuel stabilizer over the winter months while the weather provides poor riding conditions. The point is that the fuel stabilizer will create a protective layer for the fuel that sits in the tank and bind with it to prevent evaporation.

So yes, you can say it actually does the job as claimed.

How long will fuel stabilizer keep gas fresh?

Usually, fuel stabilizer will keep fuel fresh for up to 24 months. But this greatly depends on the quality, type, source of the gasoline, as well as storage conditions.

Fuel stabilizers are an essential tool to keep gasoline functioning at optimal capacity. If stored beyond 24 months, the petrol may lose its volatility and cause hard/dry starting or no start conditions. Unfortunately, a fuel stabilizer won't be able to undo any damage already done; however, adding a stabilizer can help stop further degradation of your gas in storage.

If you want to reduce the loss of fuel volatility during storing, it is recommended to fill your tank at least 95% full with fresh fuel and fuel stabilizer of your choice. Make sure you store your vehicle in cool conditions and away from direct sunlight to prevent any risky situations.


After It's All Said and Done, I Recommend:

STA-BIL Storage Fuel Stabilizer - Keeps Fuel Fresh for 24 Months - Prevents Corrosion - Gasoline Treatment that Protects Fuel System - Fuel Saver - Treats 80 Gallons - 32 Fl. Oz. (22287)

Our Rating: 96/100

Why it is the best?

  • This product comes from one of the most trusted brands available on the market
  • Works for 2 and 4 cycle engines
  • It offers you a versatile use since you can use it for cars, marine vehicles, lawnmowers, as well for snowblowers
  • Provides a smooth start for your engine even after months spent in the garage
  • Suitable for stabilizing gas and ethanol-based fuels
  • Affordable

Conclusion

Choosing the best fuel stabilizer can be a tricky task if you are not sure what your vehicle requires exactly. But that can be easily resolved if you spare some time now and read this article where I enlisted the best possible options and all their pros and cons.

Of course that after hours and hours of thorough research I found my favorite and that is STA-BIL 22214 Fuel Stabilizer

This fuel stabilizer will offer you the best value for the price, and it will maintain your vehicle in the best possible shape, so there is no need to be afraid of any unexpected expense after the winter is gone.

In case you are in desperate need of new garage floor mats, I recommend you to read this comprehensive review and find out what the market has in offer for you.

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