Quickare Fuel Treatment, 12 oz. Quickare is a fuel treatment that can be used to maximize engine performance with all grades of gasoline, help control corrosion, gum and varnish build-up and phase separation associated with ethanol-blended fuel as well as help to control moisture. Use in all grades of gasoline including ethanol blends and in 2-cycle and 4-cycle gasoline engines. Safe for catalyzed engines.