Jeep Grand Cherokee Quiz
Starting and operating

Fuel Requirements

In this manual: Starting and operating
Introduction — 7Things to know before starting your vehicle — 107Understanding the features of your vehicle — 241Understanding your instrument panel — 150Starting and operating — 143What to do in emergencies — 19Maintaining your vehicle — 78Maintenance schedules — 3If you need consumer assistance — 21
~1min read

Your vehicle will operate on both unleaded gasoline with an octane rating of 87, or E-85 fuel, or any mixture of these two. For best results, a refueling pattern that alternates between E-85 and unleaded gasoline should be avoided.

When you do switch fuel types 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 (19 Liters) 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 driveability during warm up.

• Some additives used in regular gasoline are not fully compatible with E-85 and may form deposits in your engine. To eliminate driveability issues that may be caused by these deposits, a supplemental gasoline additive, such as MOPAR Injector Cleanup or Techron may be used.

Test yourself

A quick Jeep Grand Cherokee quiz: every answer comes with an explanation and a link to the manual page.