Originally Posted by rajmangal7

I'll definitely stay away from him. I do 99% of the work on my cars myself and rarely go there. I was replacing valve cover gaskets on my Lexus and a mechanic stopped by and looked at the cam shafts and one was starting to "smoothen" and he said that was because I switched oils from royal purple to mobile one. They are both synthetic 5w-30.


-Raj