What is the best fuel type for the Audi 80?

I want to make sure I am using the most efficient and effective fuel for my Audi 80. Which type of fuel should I use and why?

The Audi 80 is designed to run on unleaded gasoline, specifically with a minimum octane rating of 87. This allows for optimal engine performance and fuel efficiency.

While unleaded gasoline is the recommended fuel type, the Audi 80 can also run on diesel fuel. However, it is important to note that using diesel fuel will not only decrease fuel efficiency, but also potentially cause harm to certain parts of the engine.

Another option for the Audi 80 is premium unleaded gasoline with an octane rating of 91 or higher. This can provide a slight increase in performance, but it is not necessary for the average driver.