What is the best oil to use in an Audi 80 engine?

I have recently bought an Audi 80 and I want to make sure I use the best oil for its engine. What type of oil should I use and how often should I change it?

The best oil to use in an Audi 80 engine is a fully synthetic oil with a viscosity of 5W-30 or 5W-40. This type of oil provides better protection for your engine and allows for smoother functioning. As for how often to change the oil, it is recommended to follow the interval suggested by the manufacturer, which is usually around every 10,000 miles or once a year.