Best Fuel Additive for Lawn Mowers

This site contains affiliate links to products. We may receive a commission for purchases made through these links.

Having the best fuel additive for lawn mowers can help you easily maintain your tools during the off-season.

As a unique formula designed to maintain your stored fuel, it’s crucial to find the best option to protect your equipment.

Let’s take a look at five of the top-rated fuel stabilizers for your gas-powered lawn equipment.

5 Best Fuel Additives for Lawn Mowers

Comparison Chart

412s WCRu S. SL500
STA-BIL Storage Fuel Stabilizer
41CgFokUCaS. SL500
STAR BRITE Stens 770-843 Gasoline Additive
41A2HvU8pIL. SL500
LUCAS LUC10013 Fuel Treatment
41zPVn03CUL. SL500
Chevron Techron D Concentrate Diesel Fuel System Cleaner
41pA5zd5yDL. SL500
STP Fuel Injector Cleaner

1. STA-BIL Storage Fuel Stabilizer

412s WCRu S. SL500

As its name suggests, the STA-BIL Storage Fuel Stabilizer is formulated to keep your fuel fresh for an extended period.

It’s one of the most effective formulas for all fuel types, including ethanol and blended fuels.


There are a few key features to consider with the STA-BIL Storage Fuel Stabilizer.

  • Long-Term Storage

One of the most popular reasons homeowners look for a fuel stabilizer is to keep gas ready to use for longer.

This formula is one of the most impressive since it can keep fuel fresh for a maximum of 24 months.

You’ll love putting this in your tools, as it helps ensure there’s no chance of clogging or damage.

  • Reduced Maintenance

Another significant benefit of this formula is that it makes it simpler to maintain your yard equipment.

Instead of draining the fuel out at the end of the season, you quickly add the stabilizer.

Once added, the additives work to stabilize the chemical structure of the gas, keeping it safe and clean.

  • Versatile Formulation

Although this formula is perfect for lawn mowers, it can also be used in a wide assortment of other gas-powered equipment.

You’ll find it’s ideal for motorcycles, vehicles, generators, boats, and small engines.

It’s highly recommended you consider STA-BIL Storage Fuel Stabilizer if you have yard maintenance equipment.

  • Prevents Buildup

You’ll love how this stabilizer helps protect the integrity of your equipment with ease.

When added, all of your gasoline will be protected, as will the interior engine components.

Over time, the formula works to prevent varnish and gum from building up.


  • Perfect for maintaining tool health
  • Maintains quick starts
  • Easy to use
  • A tested and reliable formula


  • Requires careful pouring
  • The plastic container degrades

2. Star Tron Enzyme Fuel Treatment Concentrate

41CgFokUCaS. SL500

There are several fantastic benefits this fuel treatment brings to your garage.

Whether you need to treat fuel in your lawn mower or car engine, there are plenty of uses this formula covers.


Let’s dive into some of the most impressive features of the Star Tron Enzyme Fuel Treatment Concentrate.

  • Prevents Separation

Understanding the benefits of this formula is simple once you know it’s designed to work.

When added to fuel, it helps to prevent phase separation by putting water throughout your fuel.

The water droplets are submicron-sized and are safely broken down once the engine is started.

  • Versatile Formulation

Like the previous formula we explored, this enzyme fuel treatment is helpful for any type of engine.

You’ll love using it in lawn equipment as well as large and small vehicles alike.

As an added benefit, it’s also compatible with all types of fuel, making it ideal for every household and garage.

  • Prevents Buildup

If you’re concerned about the buildup of gum, varnish, and carbon over time, this mower is ideal.

Once added to the fuel, it removes buildup while preventing more from occurring while the engine is unused.

  • Cures Ethanol Problems

If you’ve been noticing a significant reduction in your gas-powered tools’ performance, it could be its fuel.

By adding Star Tron Enzyme Fuel Treatment Concentrate to the tank, you’ll notice a significant improvement in power.

It helps cure the majority of ethanol problems while also preventing future errors from occurring.

It’s one of the best options if you need a tool to help rejuvenate old fuel.

You’ll also appreciate how it cleans your injector, valves, and carburetor once the engine is started.

  • Reduces Emissions

One of the more unique components of this formula is that it helps reduce emissions.

As one of the most significant concerns with yard equipment, the treatment helps make tools easier and safer to use.


  • Helps improve performance
  • Works perfectly with ethanol
  • Prevents gas separation
  • Easy to combine with fuel


  • The container spills easily
  • Likely doesn’t improve fuel consumption

3. LUCAS LUC10013 Fuel Treatment

41A2HvU8pIL. SL500

The LUCAS LUC10013 Fuel Treatment is one of the more versatile fuel treatments on the market.

It also has a popular formula used by hobbyists and professional drivers alike.


There are a few key features to consider with the LUCAS LUC10013 Fuel Treatment.

  • Gas and Diesel Uses

This fuel treatment is the perfect solution for a wide assortment of yard tools and vehicles.

Its unique formulation is adaptable to gasoline and diesel engines, as well as fuel-injected or carbureted engines.

  • Slick Formula

There’s no doubt that this fuel treatment is precisely what your engine needs for longevity and maintenance.

It’s specifically designed to be super slick, containing oils and additives to act as a detergent.

All of the interior components of your lawn mower will be effortlessly lubricated, allowing the engine to work effortlessly.

  • Improves Fuel Consumption

Once you add LUCAS LUC10013 Fuel Treatment to your lawn mower’s engine, it will begin using its high-detergent cleaning action.

By working its way through the interior components, it returns your self-propelled mower to a like-new condition.

You’ll begin to notice a significant improvement in performance with lessened fuel consumption.

  • Neutralizing Properties

If you’re someone who uses low sulfur diesel fuel, this additive is the perfect addition to your garage.

When added to diesel, it helps neutralize the harmful effects of low sulfur fuel on your equipment.


  • Quickly restores carburetors
  • Improves mower performance
  • Reduces gas consumption
  • Assists with maintaining interior parts


4. Chevron Techron D Concentrate Fuel Cleaner

41zPVn03CUL. SL500

The Chevron Techron D Concentrate Fuel Cleaner is an excellent option for cleaning your lawn mower’s fuel system.

It has plenty of additives explicitly designed to clean existing engines for optimal performance.


Let’s take a look at some of the best features the Chevron Techron D Concentrate Fuel Cleaner has to offer.

  • Removes Deposits

Over time, the more you use your lawn mower, the more likely it is to attract buildup and deposits.

By adding this formula to your fuel throughout the season, you can quickly and gently clean interior parts.

You’ll begin to notice a significant improvement in overall performance, making it ideal for fuel efficiency.

  • Helps To Clean IDROID

If your lawn mower requires diesel fuel, this is one of the more helpful fuel additives to consider.

When combined, you’ll find it helps clean IDROID, which are pre-existing internal diesel injector deposits.

With other fuel additives, you might find they’re unable to remove this type of debris.

  • Improved Cold Starting

Cold starting a lawn mower can often be challenging and time-consuming, especially for the first use of the summer.

The Chevron Techron D Concentrate Fuel Cleaner is formulated to help restore your mower’s combustion, improving its starting capabilities.

This feature is critical if you live in an area with colder winters.

  • Reduces Engine Noise

Old lawn mowers are often found to have more significant engine noises due to their age and buildup.

With the help of a fuel cleaner, you can considerably lower the amount of sound that comes from your lawn tools.

This benefit is significant for homeowners who live in quiet neighborhoods.

  • Versatile Use

There are many different valuables that you can use this fuel treatment with.

It complies with federal low sulfur content requirements, making it safe for cars, lawn equipment, and other small engines.


  • Quickly removes deposits
  • Highly concentrated formula
  • Easily maintains lawn equipment
  • Protects engines over winter storage


  • Not recommended for older mowers
  • The container leaks easily

5. STP Fuel Injector Cleaner

41pA5zd5yDL. SL500

As another notable brand to consider, the STP Fuel Injector Cleaner is an excellent option for cleaning your lawn mower’s engine.

It’s one of the better options for maintenance, thanks to its active ingredients.


There are a couple of notable features the STP Fuel Injector Cleaner brings to the table.

  • Concentrated Detergents

Concentrated formulas are a great item to have in your garage for maintaining your lawn mower.

By adding this formula to your tank, you’ll begin to notice a significant improvement in overall power.

It immediately begins working away gum, carbon, and varnish deposits on your fuel injectors.

  • Improved Starts

By reducing the amount of junk and debris in your lawn mower, this fluid helps improve your engine’s starting capabilities.

You’ll also find it can help reduce noise production, especially with older lawn mowers.

  • Jet Fuel Formula

One of the more unique STP Fuel Injector Cleaner components is that it’s made with jet fuel.

All of the active ingredients in the fuel helps maintain the longevity of your lawn mower’s engine over time.

  • Reduces Gas Consumption

There’s no doubt that lawn equipment eats a lot of gas over time.

If you want to save money on refills, adding this fuel injector cleaner can be a considerable benefit.


  • Prevents moisture from freezing
  • Helpful in preventing engine damage
  • Improves mower longevity
  • Assists with refreshing fuel


  • Creates a heavy oil odor
  • Requires regular treatments for results

Final Recommendation

The STA-BIL Storage Fuel Stabilizer is the best fuel additive for lawn mowers with its user-friendly formula and versatility.

As long as you use most of the bottle quickly to avoid packaging mishaps, it can be very beneficial.

You’ll begin to notice a healthier sounding engine as well as better performance within a short period.