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

To avoid sludge accumulation inside the engine, our technicians recommend using the proper synthetic oil with the appropriate oil filter.
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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
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Viewing 1 - 2 of 2 problem details
2002 Audi A4 Quattro - 1.8L 4 Cylinder Turbo 128,865 mi,
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
2002 Audi A4 Quattro - 1.8L 4 Cylinder Turbo 70,000 mi,
Dealers were using the wrong oil for warrantied 50k maintenance. Audi covered sludge issue and burned turbo.