Gas Type by Car: Regular, Premium, Diesel or E85 / Audi / AllroadAudi Allroad Gas type by year YearGas type2018Premium2016Premium (flex-fuel E85 engine available)2015Premium (flex-fuel E85 engine available)2014Premium (flex-fuel E85 engine available)2013Premium (flex-fuel E85 engine available)2005Premium2004Premium2003Premium2002Premium2001Premium Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).