Yes. While the Royal Purple HPS and XPR engine oils may be used in motorcycle applications, our Max-Cycle® line of premium synthetic engine oils have been formulated specifically for motorcycle, ATV and other power sports equipment engines and transmissions.
Max-Cycle, formulated with our proprietary Synerlec® additive technology, provides enhanced high-temperature operation and will resist oxidation more than other full synthetics. In addition, it provides significantly greater protection than any other motorcycle oil and reduces wear on cam chain tensioners and other crucial parts.
No. Royal Purple Max-Cycle synthetic oil provides exceptional wear protection and reduction in parasitic drag, yet it is also safe for use in wet-clutch applications. All viscosity grades of Royal Purple Max Cycle engine oils have been tested and rated JASO MA2 for wet clutch compatibility. The current MA2 rating is defined as most suitable for wet clutch use.
Follow the manufacturer’s recommendations regarding viscosity. Max-Cycle oils are available in SAE 10W-30, SAE 10W-40 and SAE 20W-50 viscosity grades. The most common recommendation for liquid cooled, 4-cycle motorcycle and ATV engines is SAE 10W-40. Air/oil cooled motorcycles and ATVs commonly specify a SAE 20W-50. Check your owner’s manual for verification or contact Royal Purple’s Automotive Technical Department at 888-382-6300 for assistance.
Royal Purple suggests adhering to manufacturer’s recommended oil change intervals for vehicles under warranty. Vehicles that are no longer under warranty can frequently double or triple the number of miles between oil changes depending on the vehicle, its condition, the way it’s used (excessive idling, etc.), and the oil filter that is used. For guidelines specific to your vehicle, we recommend contacting the Royal Purple Automotive Technical Department.
For Evolution and Twin Cam motors, Royal Purple Max-Cycle 20W-50 synthetic engine oil is recommended. For Sportsters and Buell motorcycles, Royal Purple Max-Cycle 20W-50 is most common, but Max-Cycle 10W-40 may be used in some applications, as well. Always be sure to verify by checking the owner’s manual for the OEM recommended viscosity grade. For additional guidance or information, contact the Royal Purple Automotive Technical department at 888-382-6300, or fill out a question form on our contact page.
Royal Purple Max-Cycle 10W-30, 10W-40 or 20W-50 full synthetic motor oil may be used in the primary tank. For Harley Davidson transmissions, Royal Purple recommends Max-Cycle 20W-50 or Max-Gear 75W-90.
NOTE: DO NOT use Max-Gear lubricants in the primary case or a transmission that contains a wet clutch.
For motorcycle 2-cycle gearboxes and 4-cycle gearboxes with a separate reservoir, Synchromax manual transmission fluid is recommended.
Yes. Royal Purple uses a unique, proprietary additive chemistry not available to other lubricant manufacturers, which is the very foundation of the benefits Royal Purple offers. This technology has a distinctive odor, different from the common odor of exhaust gases to which most riders have become accustomed.