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 further cause damage to your engine.

However, it becomes essential to look for a solution that prevents fuel degradation. The right solution is fuel stabilizer that acts as a chemical compound to make sure the fuel stays fresh and clean for longer.  

Even after years of storage, the fuel stabilizer assures to keep the fuel safe without causing any damage. With so many fuel stabilizers to choose from, here we have listed down the best ones that will help take a fair decision.

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

Editor's Rating: 4.7 out of 5 stars (4.7 / 5)

Sta-Bil 22214 Fuel Stabilizer

Sta-Bil brings you this fuel stabilizer to give you an easy and quick start after storage by keeping fuel fresh. It makes sure to keep the fuel fresh for up to 12 months during storage.

Also, this stabilizer is an excellent addition as it eliminates the need to drain fuel of 2 or 4 cycle engine before storage. Since it removes water to take care of corrosion, it ensures to cleanse fuel injectors and carburettors.

It is a good quality fuel stabilizer that is effective in all gasoline including Ethanol blends and one bottle of 16 ounces can accommodate up to 40 gallons of fuel.

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

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


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


  • Not found

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

Star Brite Star Tron Enzyme Fuel Treatment

Star Brite is a multifunctional fuel treatment that is manufactured with special enzyme technology. This stabilizer prevents ethanol fuel problems as well as phase separation.

Moreover, this stabilizer is a right choice for everyday use and seasonal storage. It ensures all the engines start and run smoothly even if the fuel is sitting idle for months.

Star Tron gives normal engine operation by breaking down excess water and sludge to sub micron size. Also, it cleans the entire fuel delivery system, removes performance rubbing gum and varnish deposits. One bottle of 32 ounces treats 512 gallons.

Talking about its recommended uses, it is compatible with all gas outboards, cars, trucks, inboards, snowmobiles, motorcycles, outdoor power equipment, ATVs, and pre-mix fuel engines.

While this stabilizer stabilizes fuel for up to 2 years, it also prevents solids to form that clog fuel injectors and carburettors. It makes sure to deliver complete and uniform combustion, increased fuel efficiency, maximum performance, reliable operation, and reduced emissions.

Plus, it helps rejuvenate old fuel and because it has concentrated formula, it is used in large and small applications. It is also suitable and safe to use in all engines.


  • Improves fuel economy and reduces emissions
  • Cleanse varnish, gum and deposits
  • Stabilizes fuel for up to 2 years
  • Prevents ethanol fuel problems


  • The spout design is poor and the product spills while pouring

Editor's Rating: 4.4 out of 5 stars (4.4 / 5)

Briggs & Stratton 100119 Fuel Stabilizer

Meet this Briggs and Stratton fuel stabilizer which has been manufactured using an advanced concentrated formula. This one is made to provide triple antioxidant protection.

Plus, this genuine formula doesn’t let the fuel go stale for up to 3 years. It is a 16 ounce bottle that is capable to treat 80 gallons.

This stabilizer guards metal engine components from corrosion and rust and also cleans the system when the engine runs. While this additive works wonders for all 2 and 4 cycle gasoline engines, it is a suitable choice.

If you buy this stabilizer, you can use it effectively for gas pressure washers, snowblowers, lawnmowers and other equipment.


  • Protects 2 and 4 cycle gasoline engine
  • Prevents corrosion
  • Stabilizes fuel for up to 3 years
  • Cleanse the fuel system when the engine runs


  • The bottle is made of poor plastic

Editor's Rating: 4.7 out of 5 stars (4.7 / 5)

PRI Fuel Stablizier For Gasoline

PRI fuel stabilizer enjoys pretty good rating as it is an efficient stabilizer for fuel storage. This product serves everyone who wants to use the fuel for whatever purpose.

This stabilizer assures smooth, easy and quick start up whilst delivering uninterrupted operations. As it comes in different sizes, it is suitable for smaller engines and equipment.

Moreover, it is a right product for hospitals that use the stabilizers to power back up their machines in critical needs. This 128 ounces bottle treats up to 2040 gallons of gasoline that implies 1 ounce to 16 gallons.

Since this stabilizer preserves the fuel in the refinery for years, the results are fresh for longer. Also, it improves the fuel economy on a range of 5-13% as the fuel storage is efficient for future use.


  • Ensures quick, easy and smooth start
  • Prevents uninterrupted operations
  • Preserves the fuel in refinery for years


  • Increase in fuel mileage is not noticeable

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

Royal Purple 11722 Max-Clean Fuel Stabilizer

Royal Purple brings you this best fuel stabilizer for small engines as well as large engines. This 3 in 1 fuel additive makes sure to keep new engines clean whilst enhancing the overall performance of your vehicle.

This fuel system treatment cleans injectors, reduces engine build up and tailpipe emissions and restores fuel economy on an average of 3.2 percent.

Moreover, this stabilizer increases horsepower on an average of 2.6 percent. It targets both combustion chamber and intake system being effective on the entire range of engines available. One bottle of 20 ounces can treat up to 20 gallons.

Whether the engine is new, old, diesel, gasoline, turbocharged, supercharged or naturally aspirated, this stabilizer works wonders. Also, it reduces hydrocarbon, CO and NOx emissions on average 12, 13 and 18%.

This system cleaner is compatible to off road motorcycles, all terrain vehicles, utility vehicles, street cruiser motorcycles, snowmobiles, street sport motorcycles, touring motorcycles, marine personal craft, etc.

Royal Purple stabilizer is known to prevent stalling, hesitation and rough idle. Also, it prevents premature spark plug fouling that can cause harm to the engine otherwise.


  • Prevents stalling, rough idle and hesitation
  • Improves fuel economy
  • Reduces carbon monoxide, hydrocarbon and nitrogen oxide emissions


  • No difference in mileage has been noticed

Editor's Rating: 4.7 out of 5 stars (4.7 / 5)

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 at least 50% longer.

This stabilizer is an easy to use product that increases power and miles per gallon. Also, it is safe to use in both 2 and 4 cycle engines and makes sure to reduce oil consumption.

Moreover, it eliminates dry starts by enhancing the performance and delivers smooth and easy starts. Even if the engine is sitting idle for a while, this stabilizer will make the engine start easily.

One ounce of bottle is capable to treat one gallon of fuel. Isn’t it great? If you are not much fond of using your car, power tool or motorbike, this stabilizer is a cost effective method to keep the engine up and running in good order.

Worrying about the engine will get clogged? With this stabilizer, you will not get any gummed up parts or clogged injectors that ruin the engine performance.

If you buy this fuel stabilizer, you will notice a huge difference in how the engine of your vehicle runs.


  • Increases oil life at least 50 percent longer
  • Reduces oil consumption
  • Easy to use and increases power


  • The stabilizer is too thick and doesn’t fill the oil filter at oil change

Editor's Rating: 4.6 out of 5 stars (4.6 / 5)

Sta-Bil 22255 Diesel Formula Fuel Stabilizer

Another fuel stabilizer from the house of Sta-Bil is here to give you major stabilizing goals. This one is an affordable choice which also delivers great performance.

This stabilizer is a diesel additive so if you own a diesel engine, this one would work the best. It keeps the fuel fresh for quick and easy start and delivers an enhanced engine performance.

Plus, this diesel additive prevents all sorts of sediment formation and sludge. Other than that, it also lubricates and cleanses the entire fuel system.

This one bottle of 1 ounce treats up to 10 gallons of fuel and is compatible with all biodiesel and ULSD blends.

As it is designed for diesel engines, you can expect good performance as it protects against corrosion. Also, it reduces oxidation of diesel fuel that is caused by thermal breakdown.

It removes dirty water which algae and microbes require for growth thus preventing any clogged or gummed up engine parts.


  • Lubricates entire fuel system
  • Reduces diesel oxidation
  • Protects against corrosion or rust
  • Prevents sediment formation


  • Overly priced product

Editor's Rating: 4.7 out of 5 stars (4.7 / 5)

Yamalube ACC-FSTAB-PL-32 Fuel Stabilizer

Yamalube brings you this fuel stabilizer at quite an affordable price and good customer rating. This product saves fuel and it is one stabilizer which is made using state or art technology to deliver good performance.

This stabilizer is compatible with a computerized vehicle, lawn mower and turbocharged vehicle. Since it protects your engine, it also assures to deliver safety, performance and economy.

Moreover, it is a three in one formula that helps preventing gum and varnish build up. The engine remains as clean as new which further enhances the fuel combustion.

With a single concentration, it can treat up to 5 gallons of gasoline. The formula removes moisture from the fuel that can cause corrosion of fuel system component.


  • Protects against corrosion for metal and aluminium fuel system
  • Prevents fuel oxidation and phase separation
  • Deals with gum and varnish build up


  • The shipping price added to the overall cost

Editor's Rating: 4.8 out of 5 stars (4.8 / 5)

Sentry New Technology Fuel Treatment

Sentry is the top rated fuel stabilizer for ethanol blends. It is an effective fuel treatment as the company has taken complete care of its formulation.

Sentry is a best option for marine applications because it turns the most damaging element in all fuel system into a beneficial component.

Moreover, this fuel stabilizer has been made of unique hydrocarbon technology. Also, it will not support microbial growth as well as will not rust or corrode any fuel system or engine.

When this stabilizer burns in the combustion chamber, the carbon deposits on valves, injectors and pistons get reduced. This fuel treatment converts the equal volume of water to a combustible so you can expect amazing results.

It is compatible for bay boats, polaris and lawn movers and once you put the product in, the engine starts running smoothly.

Furthermore, this stabilizer is made with gas plus formula which inhibits ethanol phase separation, increases lubrication, eliminates fuel water problems, reduces smoke, restores fuel, boost power, increases mileage and cleans fuel injectors.


  • Eliminates water in fuel
  • Increases lubrication and boosts power
  • Reduces smoke and restores fuel
  • Increases mileage and cleans fuel injectors


  • Not found

Editor's Rating: 4.5 out of 5 stars (4.5 / 5)

Maxima 89901 Fuel Stabilizer

Last in my list is Maxima fuel stabilizer which has been manufactured to give your engine a prolonged life. This one doubles as a corrosion inhibitor and a fuel stabilizer in order to deliver good results.

This stabilizer prevents the formation of varnish and lacquers caused by fuel degradation. Wouldn’t you like enhancing the overall performance of your engine at an affordable cost?

Moreover, this stabilizer makes sure to keep your system protected whilst fighting corrosion with the fuel system. It is the best fuel stabilizer for ethanol as it provides better protection from the harmful effects of moisture and ethanol.

One bottle of 1 ounce can treat 1.0 - 2.5 gallons of fuel as you need to mix it thoroughly in the vehicle tank and then run the engine for 5 minutes after the treatment.


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


  • Not found

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. It is confusing to pick the right fuel stabilizer so you need to pay special attention to even the smallest details.

To check how effective the product is, here are few things to keep in mind. Most of the stabilizers perform similar but every brand has its own price tag. To take a valuable product, consider these factors:

#1. Compatibility

The compatibility of a fuel stabilizer matters the most. Because you might have different types of vehicles, a fuel stabilizer that works well with most of the vehicles is recommended.  

The fuel stabilizer is made to work with ethanol blends, different machines and vehicles. Whichever stabilizer you pick, make sure to check whether it is compatible to your type of machine or tool.

#2. Ease to Use

The fuel stabilizer must be easy to use. That said, it should be mixed properly in the oil before you start the engine. The mixing must be smooth and quick and protects the engine of a vehicle or any other motorized equipment.

If the stabilizer is not easy to mix, it makes it difficult for the engine to start and will underperform. Since fuel stabilizers extend the life of fuel, the storage must also be easy for longer periods.

#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 an economical stabilizer.

One of the best ways to find the best stabilizer is by looking at its features list. Also, customer reviews can help you a lot picking the suitable product. You need to check the price because brand name matters and most of the stabilizers perform similar.

Don’t spend too much if the features are almost similar and always go for a value for money product.

#4. Brand

Brand name matters, yes it does. The brand name holds much significance so you can make your list of the best products according to the brand’s popularity.

Most of the famous brands are quite old and have proved their mettle from quite some time now. It would be good if you pick the fuel stabilizer from a reputed brand and save your hard earned money by not investing in a cheap brand.


Now that you have read this detailed review on the best fuel stabilizer, it would now be easy for you to choose the suitable product. Consider your requirements like durability, vehicle type, engine’s efficiency, and fuel economy, etc to go for the best stabilizer ever.

Regardless of the affordability factor, the stabilizer that enjoys good customer rating is good to buy. The best stabilizer will determine how long the fuel stays fresh and stable.

Talking about the best in the list, Sentry is the best marine fuel stabilizer at economical price and good performance. Whereas PRI is the best fuel stabilizer for small engine, has also been priced affordably with nice quantity per bottle. Happy shopping!

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