Long time lurker, 1st real post here.
I am in the process of desludging a 2001 VW Passat. The car has 163,000 miles, I've owned it for 10,000 miles (4 oil changes in that time) and it's had Castrol 5W-30 since new, however some OCI's have been obviously to long. The car had intermittent Low Oil...