What kind of oil for a 2005 Audi a6 3.2 quattro?

For a 2005 Audi A6 3.2 Quattro, it is recommended to use synthetic oil with a viscosity of 5W-40 that meets the VW 502.00 or 503.00 specifications. High-quality synthetic oils provide better protection and performance, especially in varying temperatures. Always check the owner's manual for any specific recommendations or requirements.