10 Best Fuel Stabilizers – Reviews and Buying Guide

Best Fuel Stabilizer

Engine fuel contains volatile compounds which evaporate and get oxidized when the fuel sits for too long. In that case, the oxidation creates new compounds which ​can cause damage to your engine.

​Therefore, it is important to look for a solution that prevents fuel degradation, with the best one being a fuel stabilizer. Basically, a fuel stabilizer is a chemical compound ​that reduces oxidation in fuel so that it stays fresh and clean for longer.  

Even after years of storage, ​a good fuel stabilizer should keep the fuel fresh and with so many ​of them to choose from, ​we have listed down the best ​fuel stabilizers in the market for easy selection. 

Check out this ​fuel stabilizer review and buy the one that suits you:

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PRODUCT

​FEATURES

Sta-Bil 22214 Fuel Stabilizer

1. Sta-Bil 22214 (Best Fuel Stabilizer for the Money)

  • Affordable stabilizer for gasoline and ethanol fuel blends
  • Keeps fuel fresh for up to 1 year
  • Protects the engine from varnish, gum, corrosion, and rust
PRI Fuel Stablizier For Gasoline

2. PRI 16G (Best Gas Fuel Stabilizer)

  • Provides a complete gasoline treatment
  • Improves fuel efficiency
  • Can be used in 2 and 4 stroke engines
Briggs & Stratton 100119 Fuel Stabilizer

3. Briggs & Stratton 100119A (Best Fuel Stabilizer for Small Engines)

  • Gasoline fuel stabilizer for both 2 and 4 stroke engines
  • Stabilizes gas for up to 3 years
  • Provides triple antioxidant protection
Star Brite Star Tron Enzyme Fuel Treatment

4. Star Brite 093108-O (Best Fuel Stabilizer for Diesel)

  • Diesel fuel stabilizer keeps fuel fresh for up to 2 years
  • Generous application ratio of 1:32
  • Improves fuel economy and reduces emiss
Royal Purple 11722 Max-Clean Fuel Stabilizer

5. Royal Purple 11722 (Universally Compatible Fuel Stabilizer)

  • Diesel, gas and ethanol-blended fuel stabilizer
  • Improves the fuel economy
  • Reduces tailpipe emissions
Lucas 10001 Heavy Duty Oil Stabilizer

6. Lucas 10001 (Best Oil Stabilizer)

  • Lubricating oil stabilizer
  • Increases oil life by up to 50%
  • Safe to use in 2 and 4 cycle engines
Sta-Bil 22255 Diesel Formula Fuel Stabilizer

7. Sta-Bil 22255 (Good Fuel Stabilizer)

  • Diesel, biodiesel and blended ULSD fuel stabilizer
  • Prevents sludge and sediment formation
  • Reduces fuel oxidation
Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer

8. Yamaha ACC-FSTAB-PL-32 (Best Fuel Stabilizer for E10 Gas)

  • E10 gasoline compatible fuel stabilizer
  • Protects the engine from rust and corrosion
  • Prevents gum and varnish build-up, oxidation and phase separation
Sentry New Technology Fuel Treatment

9. Sentry Fuel Treatments GTPQRT32 (Best Fuel Stabilizer for Ethanol)

  • A large volume of gas and ethanol fuel stabilizer
  • Eliminates water in the fuel
  • Cleans the engine and helps reduce carbon emissions
Maxima 89901 Fuel Stabilizer

10. Maxima 89901 (Best Fuel Storage Stabilizer)

  • Regular, oxygenated and reformulated gasoline stabilizer
  • Prevents the formation of varnish and lacquer
  • Protects the fuel system from moisture and ethanol’s harmful effects

PRODUCT

1. Sta-Bil 22214

(Best Fuel Stabilizer for the Money)

Sta-Bil 22214 Fuel Stabilizer
  • Affordable stabilizer for gasoline and ethanol fuel blends
  • Keeps fuel fresh for up to 1 year
  • Protects the engine from varnish, gum, corrosion, and rust

2. PRI 16G

(Best Gas Fuel Stabilizer)

PRI Fuel Stablizier For Gasoline
  • Provides a complete gasoline treatment
  • Improves fuel efficiency
  • Can be used in 2 and 4 stroke engines

3. Briggs & Stratton 100119A

(Best Fuel Stabilizer for Small Engines)

Briggs & Stratton 100119 Fuel Stabilizer
  • Gasoline fuel stabilizer for both 2 and 4 stroke engines
  • Stabilizes gas for up to 3 years
  • Provides triple antioxidant protection

4. Star Brite 093108-O

(Best Fuel Stabilizer for Diesel)

Star Brite Star Tron Enzyme Fuel Treatment
  • Diesel fuel stabilizer keeps fuel fresh for up to 2 years
  • Generous application ratio of 1:32
  • Improves fuel economy and reduces emissions

5. Royal Purple 11722

(Universally Compatible Fuel Stabilizer)

Royal Purple 11722 Max-Clean Fuel Stabilizer
  • Diesel, gas and ethanol-blended fuel stabilizer
  • Improves the fuel economy
  • Reduces tailpipe emissions

6. Lucas 10001

(Best Oil Stabilizer)

Lucas 10001 Heavy Duty Oil Stabilizer
  • Lubricating oil stabilizer
  • Increases oil life by up to 50%
  • Safe to use in 2 and 4 cycle engines

7. Sta-Bil 22255

(Good Fuel Stabilizer)

Sta-Bil 22255 Diesel Formula Fuel Stabilizer
  • Diesel, biodiesel and blended ULSD fuel stabilizer
  • Prevents sludge and sediment formation
  • Reduces fuel oxidation

8. Yamaha ACC-FSTAB-PL-32

(Best Fuel Stabilizer for E10 Gas)

Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer
  • E10 gasoline compatible fuel stabilizer
  • Protects the engine from rust and corrosion
  • Prevents gum and varnish build-up, oxidation and phase separation

9. Sentry Fuel Treatments GTPQRT32

(Best Fuel Stabilizer for Ethanol)

Sentry New Technology Fuel Treatment
  • A large volume of gas and ethanol fuel stabilizer
  • Eliminates water in the fuel
  • Cleans the engine and helps reduce carbon emissions

10. Maxima 89901

(Best Fuel Storage Stabilizer)

Maxima 89901 Fuel Stabilizer
  • Regular, oxygenated and reformulated gasoline stabilizer
  • Prevents the formation of varnish and lacquer
  • Protects the fuel system from moisture and ethanol’s harmful effects

1. Sta-Bil 22214– Best Fuel Stabilizer for the Money

Sta-Bil 22214 Fuel Stabilizer

Sta-Bil brings you this affordable 22214 fuel stabilizer to give you a quick and easy engine start after storage by keeping fuel fresh for up to 12 months.

​The stabilizer, being a fuel additive, eliminates the need to drain the fuel from your 2 or 4 cycle engines since it removes water to ​get rid of corrosion, and also cleanses fuel injectors and carburetors.

It is a good quality fuel stabilizer that is effective in gasoline and ethanol fuel blends, with one 16-ounce bottle being enough to treat and stabilize up to 40 gallons of fuel.

This product is compatible with marine personal craft and also works superbly for collector cars, lawn mowers, generators and snow blowers, etc.

Moreover, it is an incredible product that protects the engine from rust, corrosion, gum, and varnish, etc. so as to maintain the engine and make it serve you for longer.

Pros:

  • Affordable
  • Keeps fuel fresh for up to 12 months
  • Prevents varnish build up
  • Ensures quick and easy start

Cons:

  • Not suitable for diesel fuel

2. PRI 16G– Best Gas Fuel Stabilizer

PRI Fuel Stablizier For Gasoline

PRI's fuel stabilizer is the best for gas because it offers a complete gasoline treatment, while also being an efficient stabilizer for fuel storage. On top of this, it can be used with all 2 and 4 stroke gas engines, making it highly compatible.

The stabilizer assures smooth, easy and quick start-up whilst delivering efficient and uninterrupted operations in the engine.

Coming in as a 16-ounce bottle, the stabilizer can be used to treat up to 256 gallons of gasoline, which implies the ratio of 1 ounce to 16 gallons.

Other features include an increase in power output, improved fuel efficiency, and prevention of the formation of damaging deposits over time.

Pros:

  • Provides a complete gasoline treatment
  • ​Can be used in 2 and 4 stroke gas engines
  • Improves fuel efficiency
  • ​Prevents the formation of damaging deposits

Cons:

  • Not suitable for stabilizing diesel

3. Briggs & Stratton 100119A– Best Fuel Stabilizer for Small Engines

Briggs & Stratton 100119 Fuel Stabilizer

Briggs and Stratton is well known for making small gasoline engines such as those found in lawn mowers and pumps, and this means that they have perfected this product stabilizing gas in such engines.

The stabilizer contains an advanced concentrated formula that also treats fuel, and provides triple antioxidant protection to keep the fuel fresh and free of water molecules.

Another important benefit with this product is that the small 16-ounce bottle is capable of treating up to 80 gallons of fuel, and keeps it fresh for up to 3 years.

In this entire duration, the stabilizer guards all metal engine components from corrosion and rust, while also cleaning the fuel systems in both 2 and 4 cycle gasoline engines.

Apart from lawnmowers, you can this product in gas pressure washers, snowblowers, small pumps, and other small gas engine powered equipment, and this makes it one of the best fuel stabilizers for small engines.

Pros:

  • ​Works for both 2 and 4 cycle gasoline engine
  • Provides triple antioxidant protection
  • Stabilizes fuel for up to 3 years
  • Cleanses the fuel system

Cons:

  • Cannot be used on diesel fuel

4. Star Brite ​093108-O– Best Fuel Stabilizer for Diesel

Star Brite Star Tron Enzyme Fuel Treatment

Star Brite’s 093108-O is the ​ideal fuel stabilizer for diesel fuel and this makes it applicable to use with heavy machinery such as large industrial generators and trucks because most of them are powered by diesel engines. 

That said, this product can work in all types and sizes of diesel engines, and is a good choice for everyday use and seasonal fuel storage because it ensures your diesel engine starts and runs smoothly even if the fuel inside has been sitting idle for months.

The stabilizer works by breaking down excess water and sludge to sub-micron size, while also cleaning the entire fuel delivery system, removing gum and varnish deposits.

This results in improved fuel efficiency, reduced emissions (soot and smoke), improved throttle response in diesel cars and increased power output.

Coming in a 32-ounce bottle, this quantity is enough to stabilize 1024 gallons of diesel for up to 2 years.

Pros:

  • ​Generous ratio of 1 ounce per 32 gallons of diesel fuel
  • Improves fuel economy and reduces emissions
  • ​Removes varnish and gum deposits
  • Stabilizes fuel for up to 2 years

Cons:

  • Only suitable for diesel fuel

5. Royal Purple 11722– Universally Compatible Fuel Stabilizer

Royal Purple 11722 Max-Clean Fuel Stabilizer

This 11722 from Royal Purple takes the title of the best fuel stabilizer for cars because it is compatible with both diesel and gas engines, as well as all ethanol blended fuels. ​ 

​Additionally, the unit is also compatible with 2 and 4 stroke engines, making it practically ideal for all kinds of engines in the market.

​Other than this, the product is a 3-in-1 fuel additive ​that ensures new engines are kept whilst enhancing the overall performance of your vehicle.

These 3 functions include restoring and improving the fuel economy ​at an average of 3.2 percent, horsepower increment on an average of 2.6 percent and lastly, a reduction in hydrocarbon, NOx and CO emissions on average 12, 13 and 18% respectively. 

​The 11722 ​also prevents stalling, hesitation, rough idle and premature spark plug fouling, which can otherwise cause harm to the engine.

​On the downside, the 20-ounce stabilizer can only be used to treat 20 gallons of fuel.

Pros:

  • ​Compatible with different fuels and different types of engines
  • Improves fuel economy
  • Reduces carbon monoxide, hydrocarbon and nitrogen oxide emissions
  • ​Increases the engine's output

Cons:

  • ​Small ratio of 1 ounce per gallon of fuel

6. Lucas 10001– Best Oil Stabilizer

Lucas 10001 Heavy Duty Oil Stabilizer

As you all know, Lucas is one of the finest brands in manufacturing quality oil stabilizers. This heavy-duty stabilizer is made in the US and is known to increase oil life ​by at least 50%.

The ​product is very easy to use, and it increases power output as well as mileage for improved efficiency. ​It is also safe to use in both 2 and 4 cycle engines while reducing oil consumption in both.

Moreover, it eliminates dry starts by enhancing the engine's performance and raises the oil pressure so that the entire engine can be fully lubricated.

Since the stabilizer is entirely a petroleum product, it blends in with other automotive lubricants easily so that collectively, all of them keep engines running smoothly at all times. ​

Pros:

  • Increases oil life at least 50%
  • Reduces oil consumption
  • ​Blends in easily with other automotive lubricants
  • ​Safe to use in 2 and 4 stroke engines

Cons:

  • Cannot be used to stabilize gas or diesel

7. Sta-Bil 22255​– Good Fuel Stabilizer

Sta-Bil 22255 Diesel Formula Fuel Stabilizer

Another fuel stabilizer from the house of Sta-Bil is here to give you a major ​boost in keeping your diesel, biodiesel, and ULSD blended fuel fresh and in good condition for a long time.

This is actually the top rated fuel stabilizer in our review, ​which is due to a number of reasons, such as being in a very large quantity (128 ounces), enabling you to treat up to 1280 gallons of diesel fuel.

​The 22255 diesel additive also prevents all sorts of sludge and sediment formation, while also cleaning and lubricating the fuel lines for improved efficiency. ​

​Other benefits include reducing oxidation in diesel, which occurs as a result of thermal breakdown, corrosion protection and water removal from the fuel, which then eliminates fungus, bacteria and algae growth.

However, the product is quite expensive, but you get a lot of fluid for continued diesel treatment over a long period of time.

Pros:

  • Lubricates entire fuel system
  • Reduces diesel oxidation
  • Protects against corrosion
  • Prevents sludge and sediment formation

Cons:

  • ​Relatively expensive
  • ​Only suitable for diesel fuel

8. Yamaha ACC-FSTAB-PL-32​– Best Fuel Stabilizer for E10 Gas

Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer

Yamaha is better known as a motorcycle brand, and they made this genuine OEM alcohol-free Yamalube formula ​especially ​for E10 gasoline, with diverse use in both 2 and 4 stroke engines. This ​basically covers ​all motorcycles and gasoline cars as well.

​Once applied, the formula helps protect metals along the fuel lines from rust and corrosion, thereby increasing their durability factor.

​Additionally, the additive helps to prevent gum and varnish build-up, phase separation and fuel oxidation. This ensures the engine remains as clean as new, further enhancing its efficiency and mpg.

Pros:

  • Protects ​metals along the fuel system from rust and corrosion
  • Prevents fuel oxidation, gum and varnish build-up, and phase separation
  • ​Can be used in both 2 and 4 stroke engines

Cons:

  • ​Not suitable for stabilizing diesel fuel

9. Sentry Fuel Treatments ​GTPQRT32– Best Fuel Stabilizer for Ethanol

Sentry New Technology Fuel Treatment

Sentry's GTPQRT32 is a very expensive fuel stabilizer that is ideal for stabilizing gasoline and inhibiting ethanol phase separation. 

With this price though, you get twelve 32-ounce bottles, resulting in a total of 384 gallons of ethanol stabilizer, which is quite a lot, and this makes it worth the money.  ​

​The product is one of the best options for marine applications because it turns the most damaging elements in all fuel systems into ​beneficial components.

Basically, it has a unique adaptive hydrocarbon technology that helps to convert water into a combustible liquid so as to eliminate the chances of rust or even microbial growth from occurring.

Additionally, when the stabilizer burns in the combustion chamber, it reduces the carbon deposits on valves, injectors, and pistons, leaving you with a cleaner engine that produces fewer emissions. 

​Other benefits include increased lubrication, improved fuel consumption, increased power output, and cleaner fuel injectors.

Pros:

  • Eliminates water in fuel
  • Increases lubrication and boosts power
  • Increases mileage and cleans fuel injectors
  • ​Comes as a total of 384 gallons of stabilizer, which is quite a lot

Cons:

  • ​Very expensive
  • Not suitable for diesel stabilization

10. Maxima 89901– Best Fuel Storage Stabilizer

Maxima 89901 Fuel Stabilizer

Last in ​our list is this Maxima fuel stabilizer, which is specially formulated for storage and stabilization of oxygenated, reformulated and regular gasoline.

The stabilizer ​actually conditions ​gasoline so as to prevent the formation of varnish and lacquers, which occur as fuel degrades in storage.

​On top of this, the product doubles up as a corrosion inhibitor, keeping the entire fuel system looking as good as new. ​It also protects this fuel system from the harmful effects of water and ethanol. 

For proper fuel treatment, 1 ounce of the stabilizer should be applied to 1- 2.5 gallons of fuel, then mixed thoroughly.

If poured into a vehicle's fuel tank, ensure to run the engine for 5 minutes after the treatment so that it gets into the entire fuel system.

Pros:

  • Prevents the formation of lacquers and varnish
  • Fights corrosion within the entire fuel system
  • Protects fuel system from the harmful effects of ethanol and moisture

Cons:

  • Not ideal for diesel fuel

How To Buy The Best Fuel Stabilizers

How To Buy The Best Fuel Stabilizer

There are a number of fuel stabilizers available in the market today and choosing the best product can be a little challenging. ​

Most of the stabilizers perform in a similar way but there are some small differences here and there. In order to pick a valuable product, you should check how effective the product is by considering these factors​.

1. Compatibility

The compatibility of a fuel stabilizer ​is very important because it determines the type of fuel that you can use the product on.

​A product such as the 11722 from Royal Purple is the best fuel stabilizer for cars because you might have different ​vehicles with different engines, and this one works well with ​​​all kinds of engines.

However, ​the ones that are designed to work with specific fuels, such as ethanol blends, feature the best preservation enzymes and ingredients for that particular type of fuel.

The choice between these two though is down to personal preference, but ensure whichever stabilizer you pick, it is compatible with your ​engine and fuel type.

2. Ease of Use

The fuel stabilizer must be easy to use. That said, it should be mixed properly in the ​fuel before you start the engine. The mixing must be smooth and quick so that the stabilization can begin as soon as possible. ​

If the stabilizer is not easy to mix, ​then its full benefits might not be experienced, and the engine will under-perform. ​

3. Price

The price of a fuel stabilizer is the prime deciding factor because everyone has different price budget. Sometimes the product you like is expensive and so might have to settle down on a more economical stabilizer.

One of the best ways to find the best stabilizer is by looking at its features list, as well as customer reviews.

However, always ensure that first and foremost, the product is of high quality and has all the features that you need, then choose the one that is within your price range.

4. Brand

​Does the brand name matter? Yes, it does. The brand name holds ​a lot of significance and trust to the buyers and thus, you can make your list of the best products according to the brand’s popularity, then pick the best from that list.

Most of the famous brands are quite old and have proved their mettle ​for quite some time now. In fact, it would be better if you pick an expensive fuel stabilizer from a reputed brand ​than to save your money on buying the unknown. ​

Conclusion

Now that you have read this detailed review of the best fuel stabilizer, it ​is easier for you to choose the most suitable product. Simply consider your requirements like durability, ​fuel type, and quantity, ​then pick the best fuel stabilizer from the list above.

Regardless of the affordability factor, the stabilizer that enjoys good customer rating is good to buy. ​

Talking ​of the best in the list, Sentry is the best ​gasoline and ethanol-blended fuel stabilizer ​because of its good performance, whereas ​Star Brite's 093108-O takes the top spot for diesel fuel. If you want the best of both in one, Royal Purple 11722 is ​your best bet​. Happy shopping!

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