Audi sent a bulletin to owners changing the spec to a VW approved full synthetic, 5w40 preferred or 5w30 acceptable. I never bothered to investigate VW spec. I've used Mobil 1 5w30 since 30k. I have 110,000 miles now and still going strong. I change oil more often than the 10K spec, more like 6-7k. I've read several posts about oil sludge and various probllems with A4 1.8Ts. Maybe just good luck but this is the most reliable car I've ever owned. I'm betting frequent oil changes with full synthetic are really important for this model.
Yes
Oil and filter change is 4.5 litres.
20 Billion
Audi A4 2.8 1994-2001 engine code AAH quantity including filter 5.0Ltrs
Your Audi requires a synthetic oil that meets VW 502 specs. Mobil One 0w40 is an excellent choice. It is one of the very few oils that meet VW 502 specs.
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Gearbox is using proprietary Audi oil. Motor oil is any premium brand/model.
Check the bottom gearbox casing bolts arent loose.
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