Gas Type by Car: Regular, Premium, Diesel or E85 / Volkswagen / RoutanVolkswagen Routan Gas type by year YearGas type2014Regular (flex-fuel E85 engine available)2013Regular (flex-fuel E85 engine available)2012Regular (flex-fuel E85 engine available)2011Regular (flex-fuel E85 engine available)2010Regular2009Regular Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).