2007 Jeep Commander Owner Manual - Page 312

312 STARTING AND OPERATING ETHANOL FUEL (E-85) E-85 is a mixture of approximately 85% fuel ethanol and 15% unleaded gasoline. For best results, a refueling pattern that alternates between E-85 and unleaded gasoline should be avoided. When you do switch fuels, it is recommended that • you do not switch when the fuel gauge indicates less than 1/4 full • you do not add less than 5 gallons when refueling • you operate the vehicle immediately after refueling for a period of at least 5 minutes Observing these precautions will avoid possible hard starting and/or significant deterioration in drivability during warm up. NOTE: When the ambient temperature is above 90°F (32°C), you may experience hard starting and rough idle following start up even if the above recommendations are followed. WARNING! Ethanol vapors are extremely flammable and could cause serious personal injury. Never have any smoking materials lit in or near the vehicle when removing the fuel filler tube cap (gas cap) or filling the tank. Do not use E-85 as a cleaning agent and never use it near an open flame. Fuel Requirements Your vehicle will operate on both unleaded gasoline with an octane rating of 87, or E-85 fuel, or any mixture of these two.