150kW / 204 PS / 201 hp (ECE) Horsepower gross: Transmission type: manual. Number of gears: 6. According to our sources, oil, coolant and fuel capacity for this version of 2012 Audi A6 3.0 TDI are as follows: Engine lubricant oil capacity: 6.4 liter / 6.8 U.S. qt /Wx1q.