Briggs & Stratton’s NEW 5-in-1 Advanced Formula Fuel Treatment & Stabilizer safeguards engines against common ethanol problems. Our formula protects your engine against the corrosive effects of ethanol and maintains fuel stability for up to 3 years. 4 fl. oz. Treats 20 gallons of gasoline Triple antioxidant protection 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 Protects both 2- and 4-cycle gasoline engines