Audi A6 2008 3.0 diesel service and maintenance

Engine oil

Engine oil capacity: 7.2 litres (7.6 quarts)
Oil change interval is 10,000 km or one year, whichever comes first.
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30

Air filter

Replacement interval for the air filter is 20,000 km.
After prolonged driving in particularly dusty conditions, it is advisable to check the condition of the air filter earlier and replace it if the filter is visibly dirty.

Fuel filter

Audi A6 3.0 diesel fuel filter replacement interval: 60,000 km

Timing chain

There is no manufacturer specified replacement interval for the engine timing chain on Audi A6 2008 3.0 diesel, expecting it to last until the engine is overhauled (approximately 310,000 km - 520,000 km).
Based on real life experience, the Audi A6 2008 Avant 3.0 TDI quattro timing chain change interval is approximately 250,000 km as at this mileage it may become overstretched and require replacement, so it is recommended to check the condition of the chain periodically after this mileage is reached and replace the timing chain if it becomes excessively stretched or if unusual engine noises occur.

Engine coolant

Engine coolant (antifreeze) recommended replacement interval for Audi A6 3.0 diesel is 90,000 km or 5 years, whichever comes first.