Contents hide 1 2022 Jeep Grand Cherokee Fuel Requirements 2 FUEL REQUIREMENTS 3 DO NOT USE E-85 IN NON-FLEX FUEL 3.1 VEHICLES 3.2 CNG AND LP FUEL SYSTEM 3.3 FUEL SYSTEM CAUTIONS 2022 Jeep Grand Cherokee Fuel Requirements FUEL REQUIREMENTS While operating on gasoline with the required octane number, hearing a slight knocking sound from … Continue reading 2022 Jeep Grand Cherokee Fuel Requirements