Note This product cannot be shipped 2nd Day Air Royal Purple Motor Oil is recommended for use in all four cycle gasoline engines and both two cycle and four cycle diesel applications including cars, trucks, motor homes RVs, boats, commercial fleet and stationary industrial diesel engines. Royal Purple Motor Oil is a tough, long life, high performance oil that delivers superior protection and enhanced performance to gasoline and diesel engines. It gains its performance advantages from a blend of synthetic oils plus Royal Purple's proprietary, synthetic Synerlec additive technology. Synerlec additive technology greatly reduces engine wear, including ring, cylinder and bearing wear. It is extremely tenacious, adheres to engine surfaces and remains after shutdown, which provides protection upon initial startup. Environmentally Responsible Royal Purple Motor Oil extends oil drain intervals. Less oil is purchased and less oil is being disposed ofIt's good for your vehicle, and good for the environment! Tough, long life, high performance oil Superior protection and enhanced performance Greatly reduces engine wear, including ring, cylinder and bearing wear Royal Purple Motor Oils are compatible with other mineral and synthetic motor oils. Royal Purple's motor oils are API certified and will not void new car warranties. Royal Purple recommends waiting until the manufacturer's first scheduled oil change or a minimum of 2,000 miles in new gasoline engines before using Royal Purple. Allow 8,000 to 10,000 miles before use in diesel engines.