Performance

The 10 Best Fuel Stabilizers of 2020

Best Fuel Stabilizer

Photo: Sta-Bil

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 most reliable one being the use of the best fuel stabilizers. 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 performing ones in the market and provide a buying guide for easy selection. 

10 Best Fuel Stabilizers – Review

IMAGE

PRODUCT

​FEATURES

Star Brite Concentrated 093016SS

1. Star Brite Concentrated 093016SS

(Best Overall)

  • Works with all engine and fuel types
  • Up to 2 years fuel stabilization
  • Economical concentrated formula
  • Improved fuel economy and reduced emission 
Sta-Bil 22214 Fuel Stabilizer

2. Sta-Bil 22214

(Best for the Money)

  • More budget friendly
  • Ideal for both 2 and 4 cycle engines
  • Ensures quick and easy starts
  • Eliminates need for fuel drain before storage

Briggs & Stratton 100119 Fuel Stabilizer

3. Briggs & Stratton 100119A

(Best for Small Engine)

  • Perfect formulation for small engines
  • 3-year protection
  • More concentrated formula
  • Special corrosion inhibitors
PRI Fuel Stablizier For Gasoline

4. PRI 16G

(Best Gas Stabilizer)

  • Provides a complete gasoline treatment
  • Improves fuel efficiency
  • Can be used in 2 and 4 stroke engines
  • One bottle treats up to 256 gallons
Royal Purple 11722 Max-Clean Fuel Stabilizer

5. Royal Purple 11722

(Best for Motorcycle)

  • Highly effective formulation for motorcycles
  • 3-in-1 formulation
  • Ideal for both gasoline and diesel engines
  • Eliminates buildup and deposits
Sta-Bil 22275

6. Sta-Bil 22275 (Best for Ethanol)

  • Prevents ethanol fuel-related damage
  • Increases engine efficiency and power
  • Prevent corrosion and cleans fuel system
  • Effective on other non-ethanol blended fuels
Sentry New Technology Fuel Treatment

7. Sentry Fuel Treatments GTPQRT32 (Water-Eliminating Formulation)

  • Eliminates water in fuel
  • Adaptive hydrocarbon technologies
  • Stabilizes and restores fuel
  • Boosts engine power and increases mileage
Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer

8. Yamaha ACC-FSTAB-PL-32 (Stabilizer & Conditioner)

  • Stabilizes and conditions fuel
  • Alcohol-free formula
  • Protects metals from rust and corrosion
  • Prevents fuel oxidation and other build ups

Star Brite 14308

9. Star Brite 14308 (Easy Start & Smooth Running Engine)

  • Ensures easy engine start and smooth running
  • Up to 2 years gasoline stabilization
  • Prevent phase separation
  • Prevents and cures ethanol fuel problems

Star Brite Star Tron Enzyme Fuel Treatment

10. Star Brite 093132 (Enhanced Diesel Engine Performance)

  • Effective diesel fuel stabilization
  • Generous 1:32 application ratio
  • 2-year fuel stabilization
  • Improves fuel economy

PRODUCT

1. Star Brite Concentrated 093016SS

(Best Overall)

Star Brite Concentrated 093016SS
  • Works with all engine and fuel types
  • Up to 2 years fuel stabilization
  • Economical concentrated formula
  • Improved fuel economy and reduced emission 

2. Sta-Bil 22214

(Best for the Money)

Sta-Bil 22214 Fuel Stabilizer
  • More budget friendly
  • Ideal for both 2 and 4 cycle engines
  • Ensures quick and easy starts
  • Eliminates need for fuel drain before storage

3. Briggs & Stratton 100119A

(Best for Small Engine)

Briggs & Stratton 100119 Fuel Stabilizer
  • Perfect formulation for small engines
  • 3-year protection
  • More concentrated formula
  • Special corrosion inhibitors

4. PRI 16G

(Best Gas Stabilizer)

PRI Fuel Stablizier For Gasoline
  • Provides a complete gasoline treatment
  • Improves fuel efficiency
  • Can be used in 2 and 4 stroke engines
  • One bottle treats up to 256 gallons

5. Royal Purple 11722

(Best for Motorcycle)

Royal Purple 11722 Max-Clean Fuel Stabilizer
  • Highly effective formulation for motorcycles
  • 3-in-1 formulation
  • Ideal for both gasoline and diesel engines
  • Eliminates buildup and deposits

6. Sta-Bil 22275

(Best for Ethanol)

Sta-Bil 22275
  • Eliminates water in fuel
  • Adaptive hydrocarbon technologies
  • Stabilizes and restores fuel
  • Boosts engine power and increases mileage

7. Sentry Fuel Treatments GTPQRT32

(Water-eliminating Formulation)

Sentry New Technology Fuel Treatment
  • Eliminates water in fuel
  • Adaptive hydrocarbon technologies
  • Stabilizes and restores fuel
  • Boosts engine power and increases mileage

8. Yamaha ACC-FSTAB-PL-32

(Stabilizer & Conditioner)

Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer
  • Stabilizes and conditions fuel
  • Alcohol-free formula
  • Protects metals from rust and corrosion
  • Prevents fuel oxidation and other build ups

9. Star Brite 14308

(Easy Start & Smooth Running Engine)

Star Brite 14308
  • Ensures easy engine start and smooth running
  • Up to 2 years gasoline stabilization
  • Prevent phase separation
  • Prevents and cures ethanol fuel problems

10. Star Brite 093132

(Enhanced Diesel Engine Performance)

Star Brite Star Tron Enzyme Fuel Treatment
  • Effective diesel fuel stabilization
  • Generous 1:32 application ratio
  • 2-year fuel stabilization
  • Improves fuel economy
Star Brite Concentrated 093016SS

Photo: Star Brite

Star Brite Concentrated 093016SS is our best overall fuel stabilizer thanks to the fact that it cannot only work for any fuel and engine type, but is also good for both daily and long term use, and it can keep the fuel stable up to 2 years.

With the more concentrated formula, this is also a more economical fuel stabilize, as a little of it goes a long way.

This product will clean the fuel injectors and valves, while also getting rid of things like carbon deposits, varnish and gums. In turn, this helps to improve the overall performance of the vehicle, reduces emissions and also boosts the fuel efficiency.

Given the bottle design, pouring this fuel stabilizer can be a little troublesome. But using a funnel should fix this small issue, and it should hence not be a big concern.

Pros:

  • Suitable for any engine or fuel type
  • Works well for both everyday use and long storage
  • More economical to use
  • Can stabilize fuel up to 2 years
  • Significant fuel economy improvement

Cons:

  • A little troublesome to pour

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

Sta-Bil 22214 Fuel Stabilizer

Photo: Sta-Bil

Sta-Bil brings you this affordable 22214 fuel stabilizer to ensure that you get great value for your hard-earned bucks.

The stabilizer 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 on gasoline and ethanol fuel blends. And it can keep the fuel stable for up to an impressive 24 months.

This product is also 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 start ups quick a easy

Besides this 32-ounce bottle, you can also get this fuel stabilizer in other options from 4 oz to 1 gallon to cater to every motorist.

For those that use diesel fuel, this will not be an ideal product. But, this should not be a drawback as it not only does an amazing job for gasoline engines, but the brand also has other options for diesel fuel like Sta-Bil 22254.

Pros:

  • Relatively affordable
  • Will work for 2 and 4 cycle engines
  • No need to drain fuel before storage when using it
  • Prevents varnish build up
  • Ensures quick and easy start

Cons:

  • Not suitable for diesel fuel

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

Briggs & Stratton 100119 Fuel Stabilizer

Photo: Briggs & Stratton

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.

Besides lawnmowers, you can use 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.

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.

This fuel stabilizer will also not be ideal for use on diesel fuel. However, this will hardly be an issue given that most of the engines that it is meant for use gasoline.

Briggs & Stratton also has several other fantastic fuel stabilizer options like the Briggs & Stratton 100118 that will also do a fantastic job.

Pros:

  • Great for small engines
  • The more concentrated formula saves you cash
  • Provides triple antioxidant protection
  • Stabilizes fuel for up to 3 years
  • Contains special corrosion inhibitors

Cons:

  • Cannot be used on diesel fuel

4. PRI 16G – Best Gas Stabilizer

PRI Fuel Stablizier For Gasoline

Photo: PRI

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.

Given the bottle design, the fuel stabilizer is more prone to spilling when on storage. Hence, you need to take extra precaution with the storage if you do not use all of it.

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
  • A single bottle goes a long way

Cons:

  • Spills easily

5. Royal Purple 11722 – Best Fuel Stabilizer for Motorcycle

Royal Purple 11722 Max-Clean Fuel Stabilizer

Photo: Royal Purple

This 11722 from Royal Purple takes the title of the best fuel stabilizer for motorcycle because, its potent 3-in-1 will be highly effective at stabilizing motorcycle fuel regardless of the type.

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 and other emissions. 

It is compatible with both diesel and gas engines, as well as all ethanol blended fuels. Additionally, the unit can work with 2 and 4 stroke engines, making it practically ideal for all kinds of engines in the market. 

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. But, for its price this is still quite good, and this is more so if you will be using it for motorcycles. 

Pros:

  • Very ideal for motorcycles
  • Improves fuel economy
  • Reduces carbon monoxide, and other emissions
  • ​Increases the engine's output

Cons:

  • ​Small ratio of 1 ounce per gallon of fuel

6. Sta-Bil 22275 – Best Fuel Stabilizer for Ethanol

Sta-Bil 22275

Photo: Sta-Bil

For those that have ethanol engines, Sta-Bil 22275 is unbeatable as it is specially formulated to deal with and prevent ethanol-related engine damages and problems.

This fuel stabilizer will ensure that the ethanol blended fuels do not cause any corrosion, and it will allow fuel to sit on the vehicle for a long time without going bad or causing engine issues.

The formulation also allows it to give the fuel system a thorough cleanup and also increases the engine's overall power and fuel efficiency.

Despite being formulated for enthanol fuels, this is still an effective product for use on non-ethanol fuel blends.

Although the fuel stabilizer to fuel ratio is not as good as others on our list, the fact that 1-ounce can treat 5 gallons of fuel means that this 32-ounce bottle is enough to treat more than 150 gallons of fuel. For many users, this is more than enough.

Pros:

  • Effective treatment for ethanol 
  • Increases engine power and gas mileage
  • Improves fuel economy
  • Cleans up the fuel system
  • Also suitable for non-ethanol blended fuels

Cons:

  • Product to fuel ration could be better

7. Sentry Fuel Treatments GTPQRT32 – Water-Eliminating Formulation

Sentry New Technology Fuel Treatment

Photo: Sentry Fuel Treatments

Sentry's GTPQRT32 is formulated to eliminate water in fuel, and hence prevent the different problems that can occur as a result of having water in your fuel.  

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.

This fuel stabilizer looks a little expensive when you compare it to others on our list, but for its quality and effectiveness, it is still fairly priced

Pros:

  • Eliminates water in fuel
  • Increases lubrication
  • Boosts power
  • Increases mileage 
  • Cleans fuel injectors

Cons:

  • Relatively more expensive

8. Yamaha ACC-FSTAB-PL-32 – Stabilizer and Conditioner

Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer

Photo: Yamaha

Yamaha is better known as a motorcycle brand, and they made this genuine OEM alcohol-free Yamalube formula especially for E10 gasoline, and it is made to both stabilize and condition the fuel. 

This alcohol-free fuel additive is ideal for use on both 2 and 4 stroke engines. 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.

For diesel engines, this will not be an appropriate product, but this should not be a deal breaker given the amazing job that it does on gasoline and other fuels.

Pros:

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

Cons:

  • ​Not suitable for stabilizing diesel fuel

9. Star Brite 14308 – Easy Start and Smooth Running Engine

Star Brite 14308

Photo: Star Brite

A good fuel stabilizer should not just prolong the life of fuel, but also help with other things like start ups. Hence, the fact that the Star Brite 14308 delivers quick and easy engine starts, and helps ensure smooth running makes it a perfect choice.

Also, it has been formulated to keep your fuels stable fro up to 2 years, which makes it perfect for anyone that intend to keep the vehicle in storage for a long time.

The formulation of this product also helps prevent phase separation, and it is very effective at dealing with ethanol-related fuel problems. And with this product flowing through your vehicle, you also get a cleaner fuel system for improved overall performance.

Because there is no way to measure the quantity of the product when in the bottle, it is quite easy to use too much. However, you can easily solve this problem with a separate measuring tool.

Pros:

  • Starts engine easily and ensures smooth running
  • Longer fuel stabilization period
  • Effective phase separation prevention
  • Deals with ethanol-related fuel problems
  • Improves overall engine performance

Cons:

  • Easy to overuse

10. Star Brite 093132 – Enhanced Diesel Engine Performance

Star Brite Star Tron Enzyme Fuel Treatment

Photo: Star Brite

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. It ensures your diesel engine starts and runs smoothly even if the fuel inside has been sitting idle for up to 2 years.

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 thanks to the generous 1:32 mixing ratio.

This only works for diesel fuel, but there are still countless good options fro gasoline and other fuels on our list.

Pros:

  • Highly effective diesel stabilization
  • 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

How To Buy the Best Fuel Stabilizers

How to Buy the Best Fuel Stabilizers

Photo: Sta-Bil

There are a number of fuel stabilizers available in the market today and choosing the best product requires you to consider the following things.

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 Royal Purple 11722 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. And the bottle should also make pouring easy.

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

3. Stabilization Time

The stabilization time also matters a lot when it comes to choosing a fuel stabilizer as it will determine how long you can leave fuel in your car without worries,

Most of these fuel stabilizers will give you a stabilization time of anywhere from one month to over 2 years. Hence, how long you intend to store the car should help you determine the ideal product for you.

Because sometimes you can end up having to store the vehicle for longer than expected, you will always be better off with a product that provides 2-year fuel stabilization like Star Brite 093132.

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.

Some of the brands you can trust to have superior quality fuel stabilizer fro your engines are Star Brite, Sta-Bil, Royal Purple and Yamaha.

FAQs

Q: Should I Use Fuel Stabilizer?

A: Yes, if you intend to store your vehicles for extended periods, you need to use it. Without it the fuel can go stale after sometimes, which can then lead to damages to the engine and other vehicles components.

Q: How Does Fuel Stabilizer Work?

A: They have a special formulation with different compounds that when mixed with the fuel help to prevent the oxidation and breakdown of fuel. Also, they work as antioxidants and absorb water before the fuel absorbs it.

Q: Can I Use too much Fuel Stabilizer?

A: This can react badly with the fuel and cause problems fro your engine. These products will come with specific mixing ratios, and so if you put more than the recommended volume you will be using too much of it. 

Q: When Should I Add Fuel Stabilizer?

A: You should use fuel stabilizer as you plan to store your vehicle for winter or when you are planning to leave it without running the engine for several months.

Q: How Long Will Fuel Stabilizer Keep Gas Fresh?

A: It depends on the specific type and model that you are using. However, most good ones from leading brands will stabilize the fuel for anywhere between 12 and 24 months.

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 your preferred product from the list above.

From our list, the Star Brite Concentrated 093016SS takes our top overall spot because, besides working with all engine and fuel types, it also stabilizes fuel for up to 2 years and has a more concentrated formula.

For those that uses ethanol-based fuels, the Sta-Bil 22275 will be our recommendation, while the Sta-Bil 22214 is perfect for those shopping on a small budget.

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