Gas Type by Car: Regular, Premium, Diesel or E85 / Ford / FusionFord Fusion Gas type by year YearGas type2020Regular2019Regular2018Regular2017Regular2016Regular2015Regular2014Regular2013Regular2012Regular (flex-fuel E85 engine available)2011Regular (flex-fuel E85 engine available)2010Regular (flex-fuel E85 engine available)2009Regular2008Regular2007Regular2006Regular Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).