Description Reviews Royal Purple’s API-licensed Motor Oil combines premium base oils with proprietary additive technologies to create high performance motor oils that optimize engine performance. Royal Purple’s API-licensed motor oil delivers superior protection and improves performance in gasoline and diesel engines. Royal Purple’s API-licensed SN motor oil meets ILSAC GF-5 and Dexos1 performance requirements. No special procedures are necessary when upgrading to Royal Purple. Royal Purple recommends waiting until the manufacturer’s first scheduled oil change in new gasoline and diesel engines before upgrading to Royal Purple. Royal Purple motor oil is compatible with all synthetic and conventional motor oils. Performance Advantages: Better wear protection: Enhanced additive technology prevents metal-to-metal contact beyond both Dexos1 and ILSAC GF-5 specs Increased fuel efficiency A low coefficient of friction results in optimized fuel efficiency (the fuel economy of our 5W-30 meets the fuel economy requirements of a 5W-20 oil) Better protection of the expensive catalytic emission system Patented ZDDP additives optimize emissions catalyst system life Improved compatibility with fuels containing ethanol Patented additive technology prevents the white sludge and lubrication starvation that can occur with 20% or higher ethanol fuel Superior corrosion protection No rust observed in standard industry testing For those seeking enhanced performance in vehicles not under warranty, we recommend our HPS Series of high performance street motor oils with our proprietary Synerlec additive technology. For all racing applications, we recommend our XPR Extreme Performance and Racing motor oil. Note: Order 5 Qts for an oil change, or order one of our oil change kits that come with a MINI OEM filter!