Yea, color me unimpressed by your mechanic. At the moment, with what he is saying about the turbo, I think he has discovered a catastrophic failure of the bottom-line resistance subsystem. In other words, there isn't anything in operation to prevent his own bottom line from running away with your wallet.
Do like Turbo Tim suggested. When my turbo failed (and the one other member here who also lost a turbo at about the same time, I thought his did a similar thing, IIRC) I was at 60+ mph and about 3 miles from starting off. It was a 32 degree morning and the engine was STONE cold as I hadn't had the heater plugged in. The turbine side shaft SNAPPED and oil started being dutifully pumped into the exhaust line.
That said, the intake side had it's own healthy amount of oil completely coating the inside of the air hoses. This is a NORMAL THING and your mechanic *should* know it. I suspect he is hoping YOU don't, so he can NOT replace your turbo, and just charge you the full cost for a good cleaning.
Its not nice, but it happens.
For everyone wondering what has been happening with my CRD and it's engine problems... Yea... Me too. I'm almost done with the quarter of Grad School, and just made my THIRD payment without driving my CRD. At the end of this coming week, I will be done and going home, and I WILL find out WTF has been taking so long. This got to the level of stupid a LONG time ago, now it is just ridiculous. I'm SO VERY HAPPY that Chrysler decided to not honor my warranty, and is now in bankruptcy so they are protected from having to ever pay anything for this. That is DRIPPING with sarcasm, if you cant tell. *rant*