royal purple oil????

[Skeeter A]

Anybody use this stuff in a hpdizx225 or a zx250???good or bad??

[crashe12]

Just ran one gallon through my 2007 150 VMAX HPDI because I ran out of Yama-Lube. Waiting for the call on repairs, top cylinder on drivers side, no compression, less than 200 hours. Don't know if it was the oil, but it's the only thing different. Happened at 30mph, 3800-4400 rpm. Costly mistake....hard lesson but RP is not on the NMMA listing of TCW3 certified oils.. big difference between "complies' and "certified"...