It does require the special oil, ASZ is a PD engine i used to own an 02 GT TDI 130. Your mechanic is wrong this time, and if he doesn't think it's a PD then he won't have put PD oil in it, i would drain out the existing oil and refill with PD spec oil or take the car back and insist he uses PD oil in the car. It's important the correct oil is used on a PD engine.

Some say that each of his toenails are exactly the same as a woman's nipples. And that he thinks the credit crunch is some kind of breakfast cereal..
All we know is, he's called..

The not so mighty Leeds United - Firstly, beaten by a TOWN, now beaten by a VILLAGE - At what point will it stop being funny to the scum suffer?