Originally Posted By: buster
Ever since I saw those Mustang cam pics using Royal Purple, I've been impressed with RP.
Yes, It looked great...but it was only two camshafts from two cars...one with RP.
Food for thought, but here are so many variables in these kinds of things. IDK.
I think it is fine oil, but the one case of the Mustangs doesn't really prove anything in my mind.