Hey Guys, Just got mine back from the dealer tonight because mine smoked. Bone stock 06 GT with 43K miles on it. Dealer did a leak down test yadda yadda. was leaking like 60% through cylinder 2 I think. They replaced the turbo. I have always ran Mobil 1 full synthetic. It's definitely not the oil. It's just bad seals. This dealer hadn't replaced a speed6 turbo yet because of this problem, so hopefully they did it right. Oh well my warranty is up soon so hopefully this turbo will last a while longer.
Hey guys...scratch that, today the car smoked worse than ever. 2 days of smoother running and then back to garbage. Sent it back to the dealer. They're thinking motor. I'll keep you guys informed.