At our shop we used only Amsoil and BG Products. Worked great and even the owner of Amsoil would hang out and talk to us about all the oils.

I never heard the Rotella deal before, Gotta look into that more..

But i have used Amsoil with BG MOA in my Audi, Freakin car loved it.

Now i get to see which oil the new ITR motor wants in the Si