Sta-Bil Fuel Stabilizer is America's top selling fuel stabilizer. It will keep your fuel fresh for quick and easy starts after storage. It removes water to prevent corrosion and cleans carburetors and fuel injectors. Sta-Bil eliminates the need to drain fuel before storage while protecting your engine from gum, varnish, rust, and corrosion. For use in all 2-cycle and 4-cycle gasoline and diesel engines.