View 2008 Audi A6 3.2 Engine Oil Capacity What is the fuel tank capacity of audi a6 sedan? Speedometer, odometer, engine coolant temp, tachometer, oil level, power/regen, trip odometer and trip computer. Liqui Moly 5W-40 Oil Service Kit (3.0-3.2 A4,A5,S4,S5,A6 ... from s3.amazonaws.com Audi is offering the a6 sedan in three fuel options. I am worried because overfilling is really but but how can it possibly be full?