What gas does the Audi R8 use?

I'm unsure on what type of gas to put in my Audi R8. Can someone enlighten me on the correct type of gas to use for optimal performance?

The Audi R8 is designed to use premium unleaded gasoline with at least 91 octane. Using anything lower can lead to decreased performance and potential engine damage.

You can also use E10 gasoline, which is a blend of regular unleaded gasoline and ethanol. This can save you some money, but keep in mind that it may not provide the same level of performance as premium fuel.