STA-BIL Storage Fuel Stabilizer keeps stored fuel fresh indefinitely so your engine will start easily even after being stored all winter.This 32-ounce quick-measure, easy-pour bottle treats up to 80 gallons of fuel. Use STA-BIL Storage Fuel Stabilizer in any gasoline-powered vehicle or equipment you plan to store for 30-days or longer. It keeps the fuel fresh for up to 24 months during storage, eliminating the need to drain your tank.Works effectively in all gasoline blends, including ethanol-blended fuel, up to E-85. 1-ounce (30-milliliter) treats up to 2-1/2 gallons (9.5-liters) of fuel.Use STA-BIL only with fresh fuel, and keep the gas can or tank 95% full to avoid condensation build up in the tank during storage. Run Engine for five minutes after adding product to treat entire fuel system. Product does not contain alcohol. Perfect for boats, collector cars, generators, lawn mowers, snow blowers, etc.Key FeaturesPrevents gum and varnish buildup and protects metal surfaces from corrosionKeeps fuel fresh for long term storage up to 24 monthsEliminates the need to drain fuel prior to storageEnsures quick easy starts after storageEffective in all gasoline, including ethanol-blended and non-ethanol formulasFor all gasoline engines, including 2-cycleUse in your vehicles, motorcycles, small engines, generators, boatsShelf Life unopened is 8-10 years; Once opened: Two years for best results