I'd like to see a voa of their full synthetic oils touting zinc and phosphorous right on the bottle. I had cam spalling and rocker pad wear with, the 0w20 full synthetic GF-4/SM version. I had a rich tune though so it couldn't have been all the oils faught. It was a winter run and the engine was spec'd for a 5w30 so a mis application may have contributed.
I don't think they are up there with Pennzoil Ultra Platinum and Synpower, Castrol Edge american veison, Mobil 1 silver bottle, but that's just an opinion.
When I got the Mag 1 in the Clear Bottles, there was white material that had settled out of suspension so I warmed up the bottles near the entertainment center and shook them real well to mix in the additives again.