Gas Type by Car: Regular, Premium, Diesel or E85 / Volvo / XC40Volvo XC40 Gas type by year YearGas type2026Premium2025Premium2024Premium2023Premium2022Depends on engine: premium or regular2021Depends on engine: premium or regular2020Depends on engine: premium or regular2019Depends on engine: premium or regular Source: U.S. EPA / DOE fuel economy data (fueleconomy.gov).