Penrite HPR 10 20W-50 Full Synthetic Engine Oil is a premium, full synthetic SAE 20W-50 engine oil. It features a double layer of engine wear protection with Full zinc and Penrite's advanced extra ten technology. It uses advanced additive technology and a low shear rate viscosity modifier, to ensure additional protection against wear, corrosion, oil oxidation, piston deposits and sludge under all conditions. Designed for use in modern 4, 6 and 8+ cylinder multi-cam, multi-valve (including VVT), naturally aspirated, supercharged and turbocharged engines. It is particularly suited for use under high load conditions such as towing and competition or where ambient temperatures are high.