I've supported Mobil One for a long time, but I'm making the switch to the new Pennzoil Platinum and never looking back. There oil is now 100% synthetic right from the base stock, and they write 100% synthetic from natural gas right on the bottle which pins them into the corner of actually having to put synthetic in the bottle unlike some manufactures. I hope other manufacturers follow suit.
This forum explains how awesome this really is for us guys who want to use the best motor oil when we decide to go synthetic:
Discuss away, but I'd prefer this not become a brand show down. I just think it's awesome Pennzoil is bringing there premium product into the normal synthetic price range!
BTW Redline, Royal Purple, and Amisol guys I've never seen a good breakdown of how your manufactures are making your oils. Amisol won't even try to show you that the oil they make even matches any recommended specifications other than the weight, so I will never buy those products. I've never been able to find a Redline bottle in Canada.....