What are the common engine problems in the Audi 80?

I recently purchased a used Audi 80 and I want to know about the common engine problems that I should watch out for. Can you provide some insights and advice on how to prevent or fix them?

One of the most common engine problems in the Audi 80 is oil sludge buildup. To prevent this, make sure to change your oil regularly and use high-quality synthetic motor oil.

Another issue to watch out for is oil leaks, particularly from the valve cover gasket. Regularly check for any leaks and have them repaired immediately to avoid causing damage to other engine components.