The 2011 Audi A4 runs on premium unleaded (required).
The 2011 Audi A8 runs on premium unleaded (required).
The 2011 Audi A3 runs on premium unleaded (required).
The 2011 Audi A5 runs on premium unleaded (required).
The 2011 Audi S6 runs on premium unleaded (required).
The 2011 Audi R8 runs on premium unleaded (required).
The 2011 Audi S5 runs on premium unleaded (required).
The 2011 Audi Q5 runs on premium unleaded (required).
The 2011 Audi Q7 runs on premium unleaded (required).
The 2011 Audi S4 runs on premium unleaded (required).
The 2011 Audi TTS runs on premium unleaded (required).
The 2006 Audi A6 runs on regular unleaded.