Can I run the car on 91 octane?

Hi,

Yes, 91 octane will be fine. A lot of VW/Audi require a higher octane level, but I don't think this is one of them. Regardless, as long as you use at least the minimum requirement as indicated either in the owner's manual or on the fuel door, you are fine.

If you are having a problem with the vehicle, let me know what is happening. Hopefully, I can help.

Take care and God Bless,

Joe