Thanks for the reply. I do not recall reading this before. However, I think that when I had it in the shop back in September or October 2004, they checked the piston travel when the head was off (had the head machined, valve guides replaced, hydraulic lifters replaced). All pistons crowned at the top of the block. When they put it back together, it spec'd on compression and the leak down test was okay. So maybe I'll be a lucky one and the turbo is the culprit. I forgot to mention also in earlier posts that when I pulled the rubber duct work off of the turbo, I looked in the rubber ducting to see if there was a large amount of oil or oil residue in the rubber ductwork. There was a nominal amount. That ductwork looks like a bellows of sorts so there is ample room inside of it to trap oil. There wasn't much there. So I think that it is the turbo but I am going to take it back to the shop tonight and let them look at it and tell me where I'm losing the oil....... it is so voluminous an amount that I have to believe that it is the suction of the turbo that is pulling it from around it's seals. I mean that crossover pipe is really got alot of oil residue in there.

I think I am going to try the jug test of the vent pipe to see if it filles the jug with oil at highway speed. That would be the only way to really diagnose this properly is if that jug gets filled with oil from running down the highway at higher RPM's.

Thanks for posting back.

JMH