How can I improve the engine performance of my Audi A6?

I've noticed that my Audi A6's engine is not performing as well as it used to. What can I do to improve its performance?

Regularly servicing your engine can greatly improve its performance. Make sure to follow the manufacturer's recommended service schedule.

Consider using a higher octane fuel for better engine performance. However, make sure your car is compatible with the fuel type.

Adding a cold air intake or upgrading your exhaust system can also lead to improved engine performance. Just make sure to do your research and choose quality products.