Recent content by Jonathan McGraw

Thanks again to everyone who posted to my question. I going to continue to use Mobil 1 as recommenced by GM. I would like to find out performance tests of various motor oils, as mentioned by some of the folks who posted answers to my question, not out of an actual need but just curiosity. I...

Thanks to all who have answered my post so far. My original unstated question was; did Mobil 1 change from a group IV or V to a group III after GM's recommendation in 2004. And the answer I'm picking up on is, yes, but it doesn't really matter.

I been on this site today reading the replies. gimmie a little time.

Hi All I like reading this site's info. I once worked in a bearing & lube research lab many, many many years ago. Quick question: I have a 2004 Cadillac V-6. It's recommended that I use Mobile1. Did Mobile change change it's formulation from synthetic to mineral before or after 2004? I've...