Penrite 20W-40 Premium Mineral Engine Oil is a high quality mineral, SAE 20W-50 engine oil made from pure hydrocracked base oils and the latest anti-wear additive system that provides complete engine protection, less sludge formation and reduced piston deposits extending engine life. Premium Mineral 20W-50 is designed for use in modern 4, 6 and 8+ cylinder naturally aspirated, supercharged and turbocharged engines. It is also suitable for use in rotary engined vehicles such as Mazda RX series vehicles that require this viscosity grade. Premium Mineral 20W-50 is designed for use petrol, LPG and light duty vehicles where SAE 20W-50 oils are specified in the owners handbook. It meets the latest API SN/CF specification providing increased wear protection, better resistance to sludge formation and lower piston deposits than previous and lower grade oils. It can also be used where previous API specifications SM (2004-10), SL (2001-04), SJ etc were recommended.