Qualiguard 15W-40 is a high-quality mineral oil that combines high quality base oils with high performance additives to provide excellent performance in the areas of detergency while protecting against wear and corrosion. Qualiguard 15W-40 motor oil is recommended for use in gasoline engines. It helps reduce engine wear, corrosion and keeps the engine clean. It is a multigrade motor oil that allows easier starts at low temperatures and with good high temperature properties. Qualiguard High Performance 15W-40 meets and exceeds API SL requirements.