Quicksilver Quickstor Fuel Stabilizer - Add Quickstor to fuel before storing your engine to ensure your fuel is ready to go at the start of the next season. Prevent regular and ethanol-blended fuel from breaking down and oxidizing Prevent fuel system corrosion Prevent gum and varnish from forming in the fuel Keep injectors and carburetor lubricated Stabilize fuel for up to a year 1oz treats 5 gallons - 12oz bottle treats 60 gallons