Royal Purple Motor Oil Combines premium base oils with proprietary additive technologies to create high performance motor oils that optimize engine performance and provide superior protection. No special procedures are necessary when upgrading to Royal Purple. Royal Purple motor oil is fully compatible with mineral or other synthetic oils. Royal Purple recommends waiting until the manufacturers first scheduled oil change in new gasoPne engines before upgrading to Royal Purple. Royal Purples API Pcensed motor oil dePvers superior protection and improves performance in gasoPne and diesel engines. Royal Purples API SN Pcensed motor oil meets ILSAC GF-5 and Dexos1 1 performance requirements.