Sta-Bil Fuel Stabilizer Sta-Bil Fuel Stabilizer keeps fuel fresh for quick and easy starts after storage. Stored fuel can go bad in as little as 30-60 days causing gum, varnish, and corrosion to build up in the fuel lines and engine. This stabilizer removes water to prevent corrosion and cleanses carburetors and fuel injectors. Sta-Bil Fuel Stabilizer keeps fuel fresh for up to 24 months during storage, eliminating the need to drain fuel. Effective in all gasoline, including Ethanol and Non-Etha