QUICKLEEN 32oz. This is a genuine Mercury Marine factory OEM part, not aftermarket.It 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. Gas treatment and injector cleaner for use with all grades of gasoline and ethanol-blend fuel.Quickly and thoroughly removes carbon deposits from carburetors, injectors, intake valves, spark plugs, piston crowns and cylinder heads.Prevents engine knocking and piston seize-up.Can be used at every fuel tank fill-up — 1 oz. treats 5 gallons of gasoline.