Originally Posted by 02themax
... I strongly believe that the turbos would fail prematurely if the oil wasn't in good condition. We'd be seeing alot of 335's blowing smoke out the tail pipe, even with low KM's, and even more with sludge problems but I guess only time will tell. ...
These problems can take a surprisingly long time to become evident. In the case of the Passat/A4 1.8T sludge issue it was about 7 years (give or take). It is also interesting that the problems were limited to the North American market.