STA-BIL fuel stabilizer 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 life by protecting it from gum, varnish, rust, and corrosion. STA-BIL eliminates the need to drain fuel before storage and keeps stored fuel fresh for up to 12 months. For all 2-cycle and 4-cycle marine engines. Effective in all gasoline, including ethanol blends. This 16-oz. bottle treats up to 40 gallons. Shipped ground only.