Fuel additives keep your fuel optimized, protect your fuel system and remove leftover deposits that rob your engine of peak performance and efficiency. Part of Quicksilver's comprehensive three step fuel treatment system, Quickare is recommended for use at every fill up to maximize engine performance with all grades of gasoline, including ethanol blends. Each ounce treats 10 gallons and helps control corrosion and phase separation associated with ethanolâ€blended fuel. Quickare also keeps fuel fresh for up to three months between fill ups. For use in all 2†and 4â€cycle carbureted and fuelâ€injected gasoline engines. The Quicksilver brand is the leader in delivering uncompromising engine oils, parts and accessories to the marine industry for over 65 years. Quicksilver is the premier supplier of Mercury Marine Original Equipment replacement engine parts, oils, and accessories, but also works to serve all Original Equipment brands in the marine and power sports industries. It has earned a loyal following by providing the highest quality products that are tested through some of the most rigorous environments and testing procedures. No aftermarket company comes close to the level of research and design as Quicksilver; buying Quicksilver is buying performance, protection and peace of mind.