PLUS ULTRA SAE 5W30 | API SP ILSAC GF-6A FULLY SYNTHETIC ENGINE OIL Plus Ultra SAE 5W-30 Fully Synthetic Motor Oil, API SP, ILSAC GF-6A, formulated with synthetic base oils and a premium additive package, is the ultimate choice for maximum engine protection and longevity. Its advanced formula ensures superior performance, improved fuel efficiency, and reduced engine wear and tear, all while meeting the latest industry standards for gasoline engine oils.