Engine Oil and Fluid Recommendation for Audi A6 (4GC/4GD) – A6 S6 4.0 TFSI So, the first thing you need to start with the selection of oil is by studying the car's instruction manual or from its service book. Almost always, manufacturers indicate there their requirements for engine and coolant fluids, which are best used for this model.
  • Engine: CTGE
  • Engine oil capacity, liter: 8.5
  • Automatic transmission capacity, liter: 7.5
  • Year: 2014-18

Engine oil

  • Engine oil: 5W-40
  • Synthetic oil: M 5W-30

Cooling system

  • Antifreeze for the engine: Antifreeze G12+ violet