How do I maintain the longevity of my Audi's engine?

I just purchased a new Audi and want to make sure that the engine stays in top shape for as long as possible. What steps should I take to ensure this?

Regularly change the oil and oil filter every 5,000 miles. This will prevent sediment buildup and keep the engine running smoothly.

Make sure to use high-quality fuel and avoid fuel additives. These can actually harm the engine and decrease its lifespan.