Royal Purple HPS Series motor oil is specifically formulated to maximize performance and meet the demands of high performance and modified engines. HPS is recommended for vehicles no longer under manufacturer warranty and for those seeking a higher level of performance and protection.
This unique blend enables HPS to outperform leading synthetics and conventional lubricants for both gasoline and diesel engines. Royal Purple's HPS is fortified with a high level of zinc/phosphorus anti-wear additive and Royal Purple's proprietary Synerlec additive technology.
Royal Purple HPS Series of motor oil responds to increased pressure with increased viscosity. It's advanced additive technologies, such as Synerlec, improves the condition of metal-to-metal contact under severe conditions for greater protection.