Gas Type by Car: Regular, Premium, Diesel or E85 / Infiniti / QX60Infiniti QX60 Gas type by year YearGas type2027Premium2026Premium2025Premium2024Premium2023Premium2022Premium2020Premium2019Premium2018Premium2017Depends on engine: regular or premium2016Depends on engine: regular or premium2015Depends on engine: regular or premium2014Depends on engine: regular or premium Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).