Gas Type by Car: Regular, Premium, Diesel or E85 / Bentley / Continental Flying SpurBentley Continental Flying Spur Gas type by year YearGas type2013Premium (flex-fuel E85 engine available)2012Premium (flex-fuel E85 engine available)2011Premium (flex-fuel E85 engine available)2010Premium2009Premium2008Premium2007Premium2006Premium Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).