The Latest in Fuel Stabilizer Technology

Toying with the idea of tuning up your Briggs & Stratton® engine? One of the easiest ways to maintain your snow blower or lawn mower engine for seasons to come is by using fuel stabilizer. Whether putting your lawn mower or snow blower away at the end of the season or letting some time pass between uses, curbing your fuel's degradation is crucial.

Lawn Mower Fuel Stabilizer Voted #1 by Dealers in 2014 | Briggs & Stratton

One of the easiest ways to maintain your lawn mower for seasons to come is by using Briggs & Stratton's Advanced Formula Fuel Treatment & Stabilizer. It's the latest in fuel treatment technology that includes powerful fuel additives to protect your fuel system. Fuel begins degrading almost as soon as you pump it. As fuel breaks down, gums and varnishes are formed that can stick intake valves and clog fuel lines and carburetor jets, resulting in severe starting problems. 

Lawn Mower Fuel Stabilizer by Briggs & Stratton
Lawn Mower Fuel Stabilizer by Briggs & Stratton
Lawn Mower Fuel Stabilizer by Briggs & Stratton

To protect your fuel system tank from corrosion, store your lawn mower filled with Briggs & Stratton's Advanced Formula Fuel Treatment & Stabilizer sold online in our parts store or at your local Briggs & Stratton Dealer.

Protect Your Small Engines Against Ethanol

Ethanol Blended Gas | Briggs & Stratton

Briggs & Stratton's Advanced Formula Fuel Treatment & Stabilizer is the latest in fuel additive innovation, which aims to stop the harmful effects associated especially with ethanol blends, which account for nearly 90% of all fuel sold in the U.S. Ethanol-blended gas is especially prone to deterioration, leading to rust in the fuel tank, corrosion, gum build-up, and even severe engine damage. This is reflected in performance, yielding starting issues and rough running. Here's why:

  • Ethanol-based fuels attract moisture, which eventually separates from the fuel
  • A layer of ethanol-enriched water forms at the bottom of the tank, which is highly corrosive for engine parts
  • Gum and varnish forms as the fuel breaks down, resulting in stuck intake valves, clogged fuel lines and carburetor jets
  • Fuel can go stale in 30 days or less

Briggs & Stratton® Advanced Fuel Treatment & Stabilizer also guards against octane loss due to ethanol separation, protecting your engine against pre-ignition and other low-octane events.

Benefits of Fuel Stabilizer for Small Engines

Lawn Mower Fuel Stabilizer by Briggs & Stratton
  • Protect Engines Against Ethanol Triple Antioxidant 
  • Dual corrosion inhibitors guard metal engine parts against corrosion
  • Metal De-Activator stops chemical reactions caused by dissolved metals in fuel
  • Detergent ingredients prevent gum and varnish build-up on engine parts
  • Water Protection inhibitors protect against the harmful effects of water in fuel due to ethanol

The Super Concentrated Formula is available in a family of .5 oz. pouch, 4, 8 and 16 fl. oz. bottles.

Briggs & Stratton also offers a Fresh Start™ fuel stabilizer dispensing cap  for your fuel tank. Equipped with a fuel stabilizer cartridge that snaps into the cap, the Fresh Start Gas Cap will keep your gas stabilized and usable for an entire season.

Briggs & Stratton Advanced Fuel Treatment & Stabilizer maintains small engine health by maintaining fuel quality, and it keeps fuel fresh for up to 36 months—well into next season. Add the Briggs and Stratton’s advanced fuel treatment and stabilizer according to package directions and then run the engine for a few minutes to circulate the solution through the carburetor.

The Advanced Formula Fuel Treatment & Stabilizer fights the harmful effects of water separation. This fuel additive contains corrosion inhibitors that form a protective barrier on metal parts to prevent rust. Detergents help prevent gummy build-up on engine parts. A metal deactivator works to stop the aggressive chemical reactions caused by dissolved metal ions in the fuel. The net result: powerful protection for America’s favorite small engines.

For more information, check out our video on the benefits of fuel stabilizer or visit your local authorized dealer.

The right fuel treatment. From the engine experts.

Shop Related Maintenance Parts


View solutions for handling the most common engine and product troubleshooting and maintenance questions.

View FAQs



Learn about the latest products by Briggs & Stratton, step-by-step instructions on how to locate your lawn mower engine model number, and more!

Browse Videos