STA-BIL storage fuel stabilizer keeps fuel fresh for quick easy starts after storage. It removes water to prevent corrosion and cleanses carburetors and fuel injectors. This product also protects engine from gum, varnish, rust and corrosion and prolongs the life of any engine. Eliminate the need to drain the fuel of your 2 or 4 cycle engine by treating the fuel with STA-BIL before storing. This 16 Oz. quick measure easy pour bottle treats up to 40-gallons of fuel.