Gas Type by Car: Regular, Premium, Diesel or E85 / Hyundai / VelosterHyundai Veloster Gas type by year YearGas type2022Premium2021Depends on engine: regular or premium2020Depends on engine: regular or premium2019Depends on engine: regular or premium2017Regular2016Regular2015Regular2014Regular2013Regular2012Regular Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).