The 2015 Audi TT runs on premium unleaded (recommended).
The 2015 Audi A3 runs on premium unleaded (recommended).
The 2015 GMC Yukon runs on flex-fuel (FFV).
The 2015 Chevrolet Suburban runs on flex-fuel (FFV).
The 2015 Chevrolet Tahoe runs on flex-fuel (FFV).
The 2006 Audi A6 runs on regular unleaded.
The 2010 Audi A6 runs on regular unleaded.
The 2011 Audi A6 runs on regular unleaded.
The 2008 Audi A6 runs on regular unleaded.
The 2005 Audi A6 runs on regular unleaded.
The 2009 Audi A6 runs on regular unleaded.
The 2007 Audi A6 runs on regular unleaded.
The 2015 Cadillac Escalade runs on flex-fuel (unleaded/E85).