Sta-Bil keeps fuel fresh for quick, easy starts after storage. This top selling fuel stabilizer removes water to prevent corrosion and cleans carburetors and fuel injectors. Sta-Bil prolongs engine's life by protecting engine from gum, varnish, rust, and corrosion. Eliminates the need to drain fuel before storage. For all 2-cycle and 4-cycle gasoline and diesel engines. One 8-oz. bottle treats 20 gallons. Shipped ground only.