Quickare Fuel Treatment 8M0047920 is for use in all 2‑ and 4‑Stroke 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. It can help maximize engine performance with all grades of gasoline. It will help control corrosion, gun and varnish build-up and phase separation associated with ethanol blended gasoline. It will help control corrosion, gun and varnish build-up and phase separation associated with ethanol blended gasoline while cleaning existing varnish and gum deposits in fuel lines, tanks, carburetors, injectors, intake valves and spark plugs.