Originally Posted By: NHHEMI
Originally Posted By: CompSyn
Companies like Mobil 1, Red Line, Royal Purple, Amsoil, and Schaeffer's ALL make top performing engine oils that are NOT API Certified.
I think it's really a non-issue to buy non-certified lubes from trusted companies that have been around for a while and produce other products that are certified. And in many cases, a product that carries a "meets or exceeds" recommendation in lieu of a certification may perform better anyway.
I've been using a non-certified engine oil in my car for two years now and the UOAs are fine.
Amsoil XL is APi Certified as are all of the Royal Purple street oils( ie; non racing ).
Yes, that's what I was trying to say.
For example:
Amsoil XL 10W-30 - (API Licensed)
Amsoil High Performance 10W-30 (Not API Licensed)
Royal Purple High Performance 5W-30 - (API Licensed)
Royal Purple XPR 5W-30 - (Not API Licensed)
Question: Do the Non-API Licensed products listed above perform poorly because they do not carry a license?
BTW, anyone can go to the
API EOLCS Licensee Directory and look up any brand for themselves. I don't see Quaker State High Mileage listed there unless it's under another name?