just changed over to royal purple - does anyone else use this oil ?
i noticed it wasn't in " tdr " oil test . please provide some info.
i noticed it wasn't in " tdr " oil test . please provide some info.

Just read online about it, but I didn't see a rating. It is 15/40 yes, but is it CI4?? It also says to wait until 8-10,000 miles before using it...
Just read online about it, but I didn't see a rating. It is 15/40 yes, but is it CI4?? It also says to wait until 8-10,000 miles before using it...
Just curious as to why you would start using it and then ask questions...
The best advice I can give on oil selection is to pick one and stick with it.
I have heard once you go to a oil like Royal Purple it is best to stick with it? Is this true? Where are do i go are send my oil to have it analyzed?
Been using it for about 20000 miles. That is what Scott @ Massdiesel suggested. Also just went to RP in the transmission and diffs as well... Yea, I was also stunned that RP was not in the TDR article. Not really sure why, as Redline, Amsoil, and other synthetics were represented.