What is the oil capacity for a 2001 Audi A6 2.8 Quattro?

The oil capacity for a 2001 Audi A6 2.8 Quattro is approximately 6.5 quarts (or about 6.2 liters) when using a filter. It's always a good practice to check the owner's manual or consult a professional to ensure the correct amount, as variations can occur based on specific engine configurations or maintenance practices.