How can I improve the longevity of my Audi 80's engine?

I recently purchased a used Audi 80 and want to ensure its engine lasts as long as possible. What steps can I take to improve its longevity and prevent any potential issues?

Regularly change the engine oil and filter every 5,000 miles or as recommended by the manufacturer. This will help keep your engine running smoothly and prevent buildup of harmful debris.

Make sure to use high quality fuel and avoid filling up at gas stations with dirty or outdated pumps. Poor quality fuel can lead to engine problems and decreased performance.