What is the best engine oil for an Audi 80 1.8L 1984 model?

I recently purchased a used Audi 80 1.8L from 1984 and want to ensure it has the best engine oil to ensure its longevity and performance. What brand and viscosity oil is recommended? Are there any specific additives I should consider?

For your Audi 80 1.8L 1984 model, the recommended engine oil is a synthetic 5W-40. This will provide the best protection and performance for your engine. As for additives, you may consider using a fuel system cleaner every few thousand miles to keep your engine running smoothly.

I've been using Castrol EDGE 5W-40 in my Audi 80 1.8L and have had great results. It's a high-quality synthetic oil that offers excellent protection for the engine.