Gas Type by Car: Regular, Premium, Diesel or E85 / Chevrolet / TraverseChevrolet Traverse Gas type by year YearGas type2027Regular2026Regular2025Regular2024Regular2023Regular2022Regular2021Regular2020Regular2019Depends on engine: premium or regular2018Depends on engine: premium or regular2017Regular2016Regular2015Regular2014Regular2013Regular2012Regular2011Regular2010Regular2009Regular Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).