I just put a 4" turbo back exhaust on my truck and there is no oil on the turbo. I crawled around on it the other day and it's wet on back of the motor it sounds like that HPOP cover expect I'm not exactly sure check that or fix it.It could be top HPOP cover where the block meets the back cover, I've seen the turbo leak from the arm that operates the unison ring, you'll see the oil around the exhaust side of the turbo. Just get on top of the engine and look around.
Thanks for the info. You said your 05 is leaking in the same place. Is this oil leak common on these trucks? I have heard about STC fitting leaking oil or is that just a no hot start? Cuz it starts fine hot or cold.Hpop cover is behind the turbo in the valley. It's aluminum. There's a solenoid attached to it as well. Ps my 05 is doing the same thing.