FWIW, I've always ran Rotella and Amsoil high zinc.
Last I heard Forced Performance won't even warranty a turbo ran on Mobil1. I've also had a few of the knowledgeable locals who deal with high hp engines all day every day tell me to stay away from Mobil1, and they have seen more cars run spin bearings on that oil than anything else. That means more to me than any random internet forum guy's opinion and is why I've never used it.
I think super bleeder already posted it, but it's worth reading.
http://store.forcedperformance.net/m...otor%20Oil.pdf
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