What type of fuel does the Audi A6 run on?

I recently purchased an Audi A6 and was wondering what type of fuel is recommended for its optimal performance and efficiency?

The Audi A6 runs on premium unleaded gasoline, with an octane rating of 91 or higher. It is recommended to only use high-quality fuel to ensure the engine runs smoothly and efficiently.

It is important to note that the Audi A6 also has a diesel option, which utilizes ultra-low sulfur diesel fuel. This may be a more economical choice for some drivers, but it is important to make sure the fuel is compliant with the vehicle's specifications.