your gonna be so screwed if its your xpr. I heard of a guy that had his xpr go bad and he just fled the country instead of trying to pay for it.
It seems to smoke when the engine is deceling. I'd think that if it was the turbo the engine slowing down wouldnt affect it because the oil pressure would be dropping. Maybe its the valve seals since you get alot of vacum while decelling.
so you check your pipes for oil? I dont think it would hurt too check. Its better to check it now while your turbo is still in one piece.
oil should still be running through the oil lines even in decel. from what i saw the smoke stopped when the turbo sounded like it was back at idle speeds. remember the smoke it dominately white with some blue. if it were valve seals wouldnt you think it would me more blue then white? oh and where would the coolant be leaking from?
oh one lasting thing finding out your turbo is broke while your on the road sucks ass. you'll probably hear loud bangs and more smoke will come out your exhaust then lou's mouth.