What are the recommended maintenance tasks for the Audi 80's engine?

I recently purchased an Audi 80 and want to ensure proper care for the engine to keep it running smoothly. What are the specific maintenance tasks that should be regularly performed and how often should they be done?

Regular oil changes are crucial for maintaining the health of your Audi 80's engine. It is recommended to change the oil every 5,000 miles or every 6 months, whichever comes first.