May 19, 2024


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9 Best Fuel Stabilizer For Small Engines Review in 2022 To Buy Online


Are you looking for the best fuel stabilizer for small engines but don’t know where to start? Don’t worry. Locar Deals is here to help.

Sitting in the storage is just as dangerous to your vehicle & pieces of equipment as when being used. A car or equipment that sits around most of the time with gas in its tank is prone to damage.

It was not a problem in the olden days, but now, when gasoline comes with at least 10% ethanol, an idle vehicle with a filled-up tank is terrible. Ethanol absorbs water from moist air. And if your gas tank absorbs more than 500ppm of water in the fuel, there will be a phase separation process. The ethanol-water mix will get stuck to your engine, leads to corrosion, and ultimately damage your engine.

It is impossible to have a vehicle without no fuel as you can not know when you might need to ride that car sitting in your garage for weeks or months.

So, the easiest way to avoid this is to opt for a gas stabilizer for small engines. The best part is that you can use it on most gas-using devices like lawnmowers, automobiles, motorboats, & others.

Thus, today we bring you our list of the nine best fuel additives for small engines. So, let us get started and help you find a product that suits your needs.

Table of Contents Overview

Top Pick Best Ethanol Fuel Treatment For Small Engine

The prime reason to use a fuel moderator is that it makes the fuel storage easy, keeping your engines safe. 

Fuel oxidation can occur in any engine, especially when it is idle for a long time, and lead to damage. But you can avoid it by using any of our top nine fuel stabilizers mentioned below:

  1. STAR BRITE14308 Star Tron Enzyme Fuel Treatment For Ethanol Fuels
  2. STA-BIL Storage Fuel Stabilizer For Gasoline Engines With Year-Round Protection
  3. ISO-HEET Water Remover With Year Round Performance- Improves Engine Performance
  4. Sea Foam SF-16-2PK Motor Treatment Multi-Use Fuel Stabilizer
  5. STP Ultra 5-in-1 Fuel System Cleaner and Stabilizer With Advanced Synthetic Technology
  6. Royal Purple Max Clean Fuel System Cleaner and Stabilizer With PEA Detergents
  7. Lucas Oil 10303 Fuel Stabilizer For Gasoline Engines
  8. Schaeffer Manufacturing Co. 1-Gallon Bottle Neutra Fuel Stabilizer (Pack of 4)
  9. MERCURY Genuine Quickstor Fuel Stabilizer Preventing Fuel Oxidization

What Is A Fuel Stabilizer?

A fuel mitigator is a solution that provides the much-needed protection to the fuel sitting in the gas tank of your automobile and other devices that run on a fuel-based engine.

Engine fuel is a dynamic liquid that can go bad if you leave it to sit around. In other words, fuel starts to spoil even in the engine without any usage.

To stop this from happening, you can use a fuel stabilizer. A fuel moderator is generally made from petroleum products. It forms a bond with gasoline to prevent evaporation and the formation of sticky resins that can quickly ruin a carburettor.

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In simpler words, a fuel stabilizer will ensure your fuel does not absorb moisture and also limits its evaporation.

Benefits Of Using Fuel Stabilizer

A fuel alleviator is like a helping hand that every individual needs, especially if you are a car owner. 

A fuel-driven vehicle or equipment can start building up issues if kept ideal for a long time with fuel sitting in the tank. But you can save your engine by putting in that fuel stabilizer.

There are five significant benefits you can enjoy by using a fuel stabilizer for your small engines:

  1. Keep the working of your machine smooth even after months of no usage.
  2. The gasoline will not go bad or is ineffective during the storage period.
  3. Using a fuel mediator increases the lifespan of your fuel
  4. It prevents the chemical breakdown of your fuel that leads to garbage or debris formation in the tank.
  5. It assists in better fuel burning and smooth engine functioning.

How To Purchase The Best Gas Stabilizer For Small Engines?

When it comes to buying small engines fuel stabilizers, not everyone is a pro. It is hard to find a suitable product, especially if it is the first time you are buying it.

At Locar Deals, we understand how stressful it can be and how disheartening it can be if you spend a considerable sum and end up with a trashy product.

But you can avoid such a mistake if you educate yourself and understand the process of choosing the best fuel stabilizer. Below we have mentioned some factors you should consider before making any final purchase.

The first factor to look for is the storage life of your fuel stabilizer. A fuel stabilizer is a storage-based solution that keeps the fuel of your equipment or vehicle fresh for over two years.

Some products claim to protect for up to 2 to 3 years, while most come with a protection cycle of 1 year only.

The ease of using a product makes a crucial factor in its purchase. Some fuel stabilizers come in a bottle, and you directly empty them in the tank with up to 20 gallons of fuel.

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In contrast, some products need to mix in ratios like mixing one ounce of stabilizer with 10 gallons of gas & more.

If you are okay with mixing the ratios, then go for it. And if not, it is always wise to go for the one with simple usage instructions.

The next thing to ensure is that the fuel stabilizer you are buying is compatible with your vehicle or equipment. It is not always possible to use a gasoline stabilizer for a diesel engine and vice-versa.

So make sure you get the correct mediator for your engine & fuel type.

The primary function of a fuel stabilizer is to keep the gas in your engine fresh for an extended period. This is why many products do not offer additional properties like cleaning & lubricating.

A product that can keep your gas fresh and simultaneously clean & lubricate your fuel system is a much better choice than the one that does not.

So, before you make the purchase confirm that the product has these additional properties.

People require fuel stabilizers either during winters when they store away their gas-powered devices or for water absorption.

Both are poles apart requirements and need different formulations. An ethanol-based stabilizer is not ideal for water absorption purposes, while it is okay for winter storage.

So, narrow down your purpose of buying the power stabilizer and then make the purchase.

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Everyone believes in saving money, and many people go for economical purchases without realizing if they will fulfill the purpose they are looking for.

We are not encouraging you to go for a pricey product, but it is always good to carefully read every detail about the product and then choose the one that offers the best value for money.

9 Best Fuel Stabilizer For Small Engines You Can Not Avoid In 2022

The engine is the heart of any device that runs on fuel, and it is nothing new for people to store away their vehicles and machines for winters or when they are away from home.

But the issue arises when those devices & vehicles have fuel stored in their tanks. Over time without any usage, the stale fuel starts to oxidize and degrade.

It ruins the fuel and hurts the engine severely to a point where your machine might not even start.

To avoid all this chaos, you need the best fuel stabilizer for small engines, and our list of the nine best for 2022 is below. Each product is of a reputed brand and offers the best deals & best value for money.

1. STAR BRITE14308 Star Tron Enzyme Fuel Treatment For Ethanol Fuels

best fuel stabilizer for small engines
  • Brand- Star Tron
  • Weight- 8.1 ounces
  • Dimension- 8 x 3 x 2 inches
  • Good for everyday use
  • Can stabilize stored fuel for up to 2 years
  • Cures and prevents ethanol fuel problems
  • Clean fuel system for any kind of deposit like gum, carbon, varnish
  • Cleans carbs, injectors & valves
  • Offer boosted gas efficiency & performance
  • Safe for two and four-cycle engines
  • Reduces smoke and all other emissions
  • It makes all engines start easily and run smoothly

Star Tron’s Enzyme Fuel Treatment is the best fuel stabilizer for small engines in 2022. It is specially formulated to eliminate and prevent the problems of ethanol-based fuels.

It breaks down additional water & sludge or slime and ensures your vehicle or equipment runs smoother and more efficiently.

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This product works well as a fuel additive for everyday use and will stabilize your stored gasoline for two years.

This stabilizer also protects against the corrosive effects of ethanol while removing unwanted deposits like gum, carbon, and varnish. And as a result, you get a cleaned fuel delivery system, better combustion-improving overall performance, fuel efficiency, and decreased emissions.

If you use it in your automobile, expect your average mileage to increase significantly due to boosted engine performance.

Lastly, this product is not safe for diesel engines. Other than that, this product is all you need for your stored gasoline.

  • Highly concentrated- Use one ounce to 16 gallons of fuel
  • Exclusive for ethanol fuels
  • Removes gum and carbon deposits
  • Enhances combustion
  • Works well as fuel moderator and fuel system treatment

2. STA-BIL Storage Fuel Stabilizer For Gasoline Engines With Year-Round Protection

best fuel additive for small engines
  • Brand- ‎STA-BIL
  • Weight- 15.4 ounces
  • Dimension- 14.13 x 10.5 x 9.56 inches
  • Keeps fuel fresh for up to 2 years
  • 1oz treats 2.5 gallons of fuel
  • Prevents Corrosion
  • Safe to use in all gasoline engines, including 2-cycle
  • Eliminate the requirement to drain the fuel before storage
  • Ensure a quick & easy start after storage
  • It prevents gum and varnish build-up
  • Made in the USA

STA-Bil is one of the oldest and most reputed names in the American market that offers the best value. If you are looking for a solution for long-term storage, this product will provide year-round protection and keep the gasoline fresh for up to 2 years.

It is one of the most effective gasoline additives for long-term storage. It ensures no gum or varnish build-up, and your engine starts quickly and smoothly after the storage.

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STA-Bil is safe to use on all gas engines, including the two-cycle ones. This stabilizer also prevents corrosion.

Furthermore, if you buy it for your car, it will help keep your vehicle’s fuel system in good running condition while it is in storage.

One ounce of the solution is all you need for 2.5 gallons of gas, making it highly efficient.

The only drawback of this product is that it does not lubricate or clean the fuel system, unlike various other products.

  • Long shelf life
  • Recommended by some OEMs(manufacturers)
  • Can stabilize fuel for up to 2 years
  • Specially designed to remove water from the fuel system
  • It prevents corrosion, gum, and varnish build-up
  • Do not clean or lubricate the fuel systems

3. ISO-HEET Water Remover With Year-Round Performance- Improves Engine Performance

gas stabilizer for small engines
  • Brand- ‎‎Iso-HEET
  • Weight- ‎2.4 ounces
  • Dimension- 8.35 x 3.25 x 2.2 inches
  • Top-selling brand of premium gas-line antifreeze
  • Absorbs five times more water than regular gas-line antifreeze
  • Cleans fuel injectors and carburettors
  • Designed for year-round use in all 2-cycle and 4-cycle gas & diesel engines
  • Removes water from fuel system-Prevents rust and corrosion
  • Highly affordable

ISO-HEET is a fuel antifreeze, injector cleaner, and water remover that absorbs up to five-time the water of regular gas stabilizers.

You can use it year-round, and it is safe to use in all two and four-cycle gasoline and diesel engines.

It removes water from the fuel system and prevents rust and corrosion. Using this fuel stabilizer will clean your fuel injectors and carburettors.

The recommended usage treatment uses one 12-ounce bottle per full tank of fuel.

  • Excellent work at removing water from the fuel system
  • Compatible with both gas and diesel engines
  • Affordable
  • Not ideal for long-term storage

4. Sea Foam SF-16-2PK Motor Treatment Multi-Use Fuel Stabilizer

best ethanol fuel treatment for small engines
  • Brand- ‎‎‎Sea Foam
  • Weight- ‎2 pounds
  • Dimension- ‎10 x 10 x 5 inches
  • Dissolves & cleans fuel deposits & sticky residues from fuel injectors, carburetors, and combustion chambers.
  • It does not contain any harsh detergent or abrasive chemicals
  • Control moisture in the fuel
  • Add lubricity to fuel
  • Quiet noisy lifters

Sea Foam helps stabilize stored fuel for up to two years by resisting evaporation, preserving ignition vapors, and preventing the formation of gum and varnish.

This fuel stabilizer lubricates the upper cylinders of the engines and helps to protect the entire fuel system from wear, drying out, and corrosion.

It can stabilize gasoline and diesel for up to two years. Also, it is the only energy mitigator for small engines on this list that you can add to motor oil to clean oil passages.

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This product dissolves & cleans fuel deposits & sticky residues from fuel injectors, carburetors, and combustion chambers.

Furthermore, this product can help prevent varnish deposits and internal impurities from building up on intake pistons, cylinders, and valves if appropriately used.

  • Easy to use
  • Cleans and lubricates the fuel system
  • Compatible with both gasoline & diesel engines

5. STP Ultra 5-in-1 Fuel System Cleaner and Stabilizer With Advanced Synthetic Technology

best fuel stabilizer for non ethanol gas
  • Brand- STP
  • Weight- ‎12 Ounces
  • Dimension- 8 x 4 x 1.5 inches
  • Save gas by deep cleaning the fuel system
  • Restore peak performance
  • Reduce friction
  • Prevent ethanol deposits
  • Inhibit corrosion
  • 12 ounces treats up to 35 gallons of gasoline
  • Enhances motor oil’s effectiveness
  • Compatible with modern gasoline engines like turbo, direct inject, and hybrid vehicles

STP’s ultra fuel system cleaner is formulated to deep clean the entire fuel system and help save gas, and decrease emissions.

It helps restore the peak performance and reduce friction by lubricating the engine parts. This product further helps in preventing ethanol deposits and inhibits corrosion.

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It is one of the best ethanol fuel treatments for small engines. You can use this fuel stabilizer with modern gasoline engines like turbo, direct inject, and hybrid vehicles. Also, it is compatible with cap-less gas systems.

Using this product can help eliminate the harmful engine deposits and counter engine friction, and it can help improve performance if used in automobiles.

Twelve ounces of this solution can treat up to 35 gallons of gas. However, this product is not safe to store the fuel for a long time.

  • Made for modern engines
  • Lubricates engine parts
  • Reduce friction
  • Boost fuel economy when used in automobiles
  • Bottles are compatible with cap-less fuel tanks
  • Inhibit corrosion
  • Usage will not void warranties
  • Not a good solution for short or long term storage

6. Royal Purple Max Clean Fuel System Cleaner and Stabilizer With PEA Detergents

best fuel stabilizers for small engines
  • Brand- ‎Royal Purple
  • Weight- ‎1.2 pounds
  • Dimension- ‎2.63 x 2.63 x 9.73 inches
  • Formulated with PEA detergents to clean the entire fuel system
  • Reduces deposit-related engine knocking and pinging
  • Penetrates and removes the most stubborn deposits 
  • Improve fuel economy and restore horsepower
  • Prevent premature spark plug fouling
  • One bottle treats up to 20 gallons
  • Recommended for use every 20,000 miles
  • Stabilize fuel during off-season and storage
  • Inhibit corrosion and oxidation

Royal Purple is a big name known for producing all kinds of consumer, industrial and commercial oils & fluids. 

It is formulated with PEA detergents that provide exceptional cleaning of the entire fuel system eliminating build-ups and deposits.

The makers also claim that using this fuel stabilizer will reduce hydrocarbon, NOx, and CO emissions by 18% and restore horsepower by 2.6%.

This product will help eliminate rough idling, hesitation, pinging, knocking, and engine stalling. It is compatible with any engine and fuel type, including diesel, biofuel, and ethanol.

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Twenty ounces of this product can treat up to 20 gallons of fuel. The makers recommend using it annually or every 20,000 miles.

It works well as a fuel stabilizer, but makers do not specify the length of time. So, it is better to look for another product if your storage period is longer than a few weeks.

  • Cleans entire fuel system completely
  • Lowers emissions
  • Works well with gasoline & diesel engines
  • Stabilizes fuels and is suitable for any fuel type
  • Not ideal for long term storage

7. Lucas Oil 10303 Fuel Moderator For Gasoline Engines

best fuel stabilizer review
  • Brand- ‎‎Lucas Oil
  • Weight- ‎15.1 ounces
  • Dimension- 5 x 5 x 5 inches
  • Safe for all grades of gasoline, including ethanol & non-ethanol blends
  • Stabilizes gasoline for up to one year
  • Cleans & lubricates the entire fuel system
  • One ounce treats one gallon of gasoline
  • Safe for 2- and 4-cycle engines

Lucas Oil 10303 fuel stabilizer cleans and lubricates the entire fuel system, including the fuel pumps, injectors, carburetors, and valves.

The additives in the product prevent corrosion and deposits. This product is safe to use on two-stroke and four-stroke engines.

It helps in preventing gasoline breakdown during storage. The only drawback to this product is its usage ratio, and it needs one ounce for every gallon of gas, making it more expensive than other products on this list.

Lastly, this product is not safe for diesel engines.

  • Safe to use with gasoline engines
  • Suitable for ethanol and non-ethanol gas
  • Cleans & lubricates the entire fuel system
  • Higher stabilizer to gallon ratio

8. Schaeffer Manufacturing Co. 1-Gallon Bottle Neutra Fuel Stabilizer (Pack of 4)

best fuel stabilizer for small engines 2022
  • Brand- ‎‎Schaeffer Manufacturing Co
  • Weight- 33.6 pounds
  • Boost performance and fuel efficiency by up to 5%
  • Lowers the freezing point of any water that may be present in the fuel
  • Keep injectors free from any kind of deposits, gum & varnish
  • Reduce emissions
  • It comes in a pack of four 1-gallon bottles

The neutral fuel stabilizer by Schaeffer Manufacturing Co is the most expensive product on this list. Well, the cost comes with quantity and convenience.

This power stabilizer is compatible with different vehicles, including gasoline, petroleum, and ethanol.

Using this stabilizer will reduce the emissions, exhaust smoke & particulates and optimizes the fuel economy and performance by up to 5%.

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This product helps keep injectors free of deposits, gum, and varnish. It disperses the existing deposits throughout the fuel system, removing them to the combustion chamber where they can burn wholly & cleanly.

This product comes in four 1-gallon bottles, and you can use them for several years.

  • Come in huge quantity
  • Boost fuel economy & performance
  • Reduce emissions
  • Keep fuel system clean of deposits and corrosion

9. MERCURY Genuine Quickstor Fuel Stabilizer Preventing Fuel Oxidization

best fuel stabilizer for small engine
  • Brand- Mercury Marine
  • Weight- ‎2 pounds
  • Dimension- ‎10.87 x 8.25 x 8.5 inches
  • It prevents your fuel from breaking down & oxidizing
  • Lubricates the injectors &carburetor
  • Prevent fuel system corrosion
  • Prevent gum & varnish formation & settlement in the fuel

Mercury Quickstor is a reliable and safe fuel moderator for your gasoline left in the tank. Add this solution to your fuel before storing your equipment or vehicle away to prevent the regular or ethanol-blended power from breaking down & oxidizing.

This product helps prevent fuel system corrosion, gum & varnish formation in the fuel, and settling in the fuel lines & tanks, injectors, and carburetors.

This fuel stabilizer for small engines can keep your fuel fresh for up to a year and even keep the carburetors& injectors lubricated.

  • Affordable
  • It prevents corrosion and deposits from settling
  • Keep carburetor& injectors lubricated
  • Prevent the fuel from oxidizing
  • Can keep your fuel fresh for up to 1 year
  • Only compatible with gasoline or ethanol engines

Top FAQs About Gas Stabilizer For Small Engines

Is it safe to use too much fuel stabilizer?

NO. You should never overuse a stabilizer for engine fuels. Always follow the manufacturer’s instructions for usage. Using more than the recommended amount is most likely to kill your engine’s performance instead of boosting it.

How long does an average fuel stabilizer last?

Generally, an energy stabilizer lasts from one to three years. However, some products are more than a moderator but only last for a couple of weeks.

So, the longevity of any fuel mitigator depends on your needs. If you are going to lock away your equipment or vehicle for just a couple of weeks, then going for a fuel stabilizer for that exact period is okay.

However, if you want long-term protection without using the product again & again, go for the long-life ones.

Does using a fuel stabilizer improve the engine’s performance?

It doesn’t matter if you are using a fuel stabilizer for your automobile or a house device; it can boost the engine’s overall performance if used correctly.

It is especially relevant to vehicles where you can see the boost in fuel efficiency and overall engine performance.

However, if not applied as directed, it can hurt your engine. After months of storage, your engine can have poor performance, or it may not start.

How does a fuel stabilizer work?

A fuel mediator is a chemical solution that works on chemically slowing down the oxidation process and forming a bond with the absorbed water so that it does ruin the fuel in your engine.

When is the right time to use a fuel stabilizer?

The correct time to use a fuel stabilizer is when you put away your automobile or pieces of equipment for months. The stabilizer will ensure that the fuel in those tanks does not degrade and prevents the engine from rusting & deposit settlement.

Can I use a stabilizer on lawnmowers &snowblowers?

YES. You can use a fuel equilibrium on anything that runs on fuel, and all you need to do is fill your gadget with the proper amount of stabilizer to fuel ratio, and you are good to go.

Your home equipment will be good to use when you take them out of teh garage after months of usage.

What is the best fuel moderator for small engines?


Owning the best fuel stabilizer for small engines is the only way for you to protect all that stored fuel in your automobile & equipment’s engines.

We have covered the nine best products available in 2022, and we hope you find the most suitable one per your requirements.


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