Use correct oil/filter to prevent sludge accumulation on Audi A4 Quattro

Problem Description and Possible Solution
To avoid sludge accumulation inside the engine, our technicians recommend using the proper synthetic oil with the appropriate oil filter.
Problem Data
RepairPal Verified
Average mileage: 99,432 (70,000–128,865)
Engine affected: 1.8L 4 Cylinder Turbo
10 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2005, 2006
12 people reported this problem
Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
Viewing 1 - 2 of 2 comments
The low oil light keeps coming on. When I check the oil on the dipstick it is perfectly fine. I opened the engine oil cap and the inside was black. I had a recent antifreeze leak that apparently contaminated the oil, so I changed the oil. The oil on the dipstick is clean but when you look at the cap it's all black
Dealers were using the wrong oil for warrantied 50k maintenance. Audi covered sludge issue and burned turbo.