Quickstor should be added to fuel before long-term boat storage to prevent regular and ethanol-blended fuel from breaking down and oxidizing as well as preventing fuel system corrosion. Quickstor stabilizes fuel for up to a year and keeps injectors and carburetors lubricated with all grades of gasoline including ethanol blends. Use in 2-cycle and 4-cycle gasoline engines. Safe for catalyzed engines. Sold in case pack only.