Briggs & Stratton has improved the formula for its proprietary 5-in-1 Advanced Formula Fuel Treatment & Stabilizer to include five times more detergent than the previous formula. The added detergent works harder to clean the engine while it runs, preventing gumming and varnishing within the fuel system.

In addition to the improved detergent, the super-concentrated Briggs & Stratton's Advanced Formula Fuel Treatment & Stabilizer still contains:

  • Triple anti-oxidants to stabilize fuel
  • Corrosion inhibitors and metal de-activators to protect the metal engine components from rust and corrosion
  • A powerful detergent that cleans while the engine runs, preventing gumming and varnishing within the fuel system.

Briggs & Stratton's proprietary formula is the only innovation on the market that protects and maintains fuel stability for up to three years. Advanced Formula Fuel Treatment & Stabilizer is also alcohol-free, which is important when combating the effects of gasoline that already contains up to 10 percent alcohol. "Just like looking at a nutritional label, people need to review the ingredients in fuel treatments," said Carissa Gingras, director of marketing for Consumer Engine and Service at Briggs & Stratton. "Alcohol can be listed under many names, including glycol ether, or isopropyl alcohol, so mower owners need to be aware of what they are buying.  We do not recommend adding more alcohol for use in Briggs & Stratton® engines."

Briggs & Stratton introduced its Advanced Formula Fuel Treatment & Stabilizer in 2011 to combat ethanol-related fuel problems and prevent gas oxidization that both can result in costly repairs. About 90% of the fuel sold in the United States contains ethanol, usually designated as E-10. Ethanol-blended fuel is a corrosive substance and can cause the gradual destruction of the metal used in the fuel systems of outdoor power equipment. In addition, gasoline can begin to degrade 30 days after it is pumped and this stale gas can cause carburetor jets to plug.

The Briggs & Stratton 5-in-1 Advanced Formula Fuel Treatment and Stabilizer is available in ½ oz. pouches, and 4-, 8-, and 16-oz. bottles at many home improvement retailers and Briggs & Stratton sales and servicing dealers.