Quickstor Fuel System Treatment and Stabilizer 8M0047922 is for use in all 2‑ and 4‑cycle carbureted and fuel‑injected gasoline engines including cars, trucks, motorcycles, ATVs, snowmobiles, marine engines, lawn mowers, chain saws, string trimmers and snow blowers. Safe for catalyzed engines. Add to fuel before long-term boat storage. Stabilizes fuel for up to one year. One ounce treats five gallons. Prevents regular and ethanol blended fuel from breaking down and oxidizing. Prevents fuel system corrosion. Prevents gum and varnish from forming in the fuel and then settling in fuel lines, tanks, carburetor and injectors.