Royal Purple High Performance Marine Oil (HPM) is specifically formulated to maximize performance and provide superior protection for four-stroke marine engines. HPM oils are certified NMMA FC-W Catalyst Compatible, and exceed stringent OEM performance and warranty requirements. HPM motor oils provide exceptional anti-wear protection with a load-carrying capacity multiple times that of ordinary mineral or synthetic marine lubricants. It delivers cooler operating temperatures, increases engine efficiency and maximizes horsepower and torque. Royal Purple's advanced, proprietary Synerlec technology enables HPM to exceed the harsh demands of marine applications.