What is the best fuel type for an Audi A6?

I recently purchased an Audi A6 and I'm unsure of which fuel type is best for optimal performance and fuel efficiency. I've heard that there are different options available for this car. Can you provide some insight into the best fuel type to use?

Based on my experience with my own Audi A6, I highly recommend using premium unleaded gasoline. This fuel type is specifically recommended by Audi and will provide the best performance and fuel efficiency for your car. I've used other fuel types before, but have noticed a significant difference with premium unleaded.

I've been using regular unleaded gasoline in my Audi A6 and haven't had any issues so far. While it may not provide the same level of performance as premium unleaded, it is a more affordable option and still works well. Ultimately, it depends on your personal preference and budget.