One of the reasons I run synthetic is to ensure long turbo life. I'm wondering if group III synthetics are any better than regular dinos at protecting the turbo. I don't do extended drains so Amsoil and Redline are probably not worth it to me. And I'd hate to drive 45 minutes to the Autozone just to get the Mobil 1 0w-40. I can get Castrol Syntec (VW dealer) and Synpower (Napa) in the 5w-40 grade recommended by VW fairly easily. Am I jeopardizing my turbo by using one of these group III's? Thanks again everybody.