Quote Originally Posted by tank500999 View Post
get a can of seafoam fron any automotive store. drain the old oil out and change the filter. put a bout 1/2 to 3/4 of the can in the engine along with the right amount of oil and let it idle for about 5 to 10 mins. turn the car off and drain oil again. repeat this process about 2 to 3 times.
this is what most folks i see on the audi forum do to correct the sludge problem. either way, once u get it fixed, use a good synthetic oil and get the oversized filter for the 1.8t. i get both from ecs tuning (i forget the exact website) for my audi. they should have the appropriate filter for ur vw.

good luck!