Royal Purple HMX is designed to protect engines and improve performance. It uses special zinc and phosphorus additives along with Synerlec technology to reduce wear. HMX helps revitalize seals to lower oil consumption in older engines. Strong detergents keep the engine clean, extending its life. Synerlec technology also reduces friction for better performance and provides strong resistance to oxidation, which helps extend oil change intervals. Additionally, it ensures a lasting oil film on parts to reduce wear during start-up. The product weighs 9.5 lb and has a viscosity of 5W-20.