Sta-Bil Storage Fuel Stabilizer keeps fuel fresh for quick, easy starts after storage. It removes water to prevent corrosion and cleans 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 in the off-season. For storage use: 1 oz. treats up to 2.5 gallons of fuel. 128 oz. Protects engine from gum, varnish, and rust Eliminates the need to drain fuel during storage | Fuel Stabilizer, 128 oz