Royal Purple Max-Cycle 10W-40 High Performance Synthetic Motorcycle Oil is specifically formulated to exceed the demands of highly stressed engines and transmissions. It is recommended for use in both air-cooled and liquid-cooled 4-cycle engines and is compatible with wet-clutch transmissions. Formulated with select synthetic base oils and Royal Purple's proprietary Synerlec additive technology, Max-Cycle provides improved film strength when compared to the leading synthetic and mineral oil. Its shear stability and oxidation resistance promote greater performance and protection. Max-Cycle exceeds API/JASO new warranty requirements and is compatible with other mineral and synthetic motor oils. No flushing is necessary prior to use.