Audi A4 2004 2.7 diesel service and maintenance

Engine oil

Engine oil capacity: 8.2 litres (8.7 quarts)
Recommended oil type (Oil Viscosity Classification SAE) is 5W-30

Timing chain

There is no manufacturer specified replacement interval for the engine timing chain on Audi A4 2004 2.7 diesel, expecting it to last until the engine is overhauled (approximately 310,000 km - 520,000 km).
Based on real life experience, the Audi A4 2004 2.7 TDI Automatic timing chain change interval is approximately 200,000 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.