Originally Posted By: Mach1Owner
One of the quotes was:
"I have torn apart over a dozen mod motors with top end issues from running royal purple. Most had destroyed cam towers. RP is just too thin. My own personal experience, my own opinion." I assume they are referring to w20 as there was no weight specified.
If RP is of the correct grade and specification for the engine, then it's not the oil's fault. If an engine fails because the oil is too thin, it's not because someone grabbed the wrong brand of approved 5w-20, it's because the improper oil was specified in the first place or there was a factory defect.