There's a new VW dealer where I live. The old dealer sold VW/Porsche to the new owner and kept BMW.
I recently took my 2003 Passat VW 1.8T in for maintenance. The shop ticket shows that the new dealer used Mobil 1 5/30 (or 0/30 -- I have the receipt at home right now) synthetic. I didn't see this oil on the list of "approved" oils that I received from VW when the engine warranty was extended, a few years ago, due to sludge problems. The old dealer used an approved Castrol synthetic.
I went to VW's web site, but I couldn't find a list of approved oils. I then called VW and was basically given a run around. I was told that there isn't a master list that can be viewed or obtained by the general public or even VW turbo owners. I could only ask about a particular oil. I wasn't left with a warm and fuzzy feeling about the VW guy's competence given his general ignorance about the sludge problem and the extended warranty.
Is there a newer list of oils that must be used to have the extended warranty apply?
The following is from the materials I received a few years ago (with the listed oil omitted): Warranty extended to 8 yeas and unlimited mileage. Requirements: oil change 5000 miles/6 months Approved oils: VW 502.00