Ford Mustang Quiz
Fuel and Refueling

Fuel quality

In this manual: Fuel and Refueling
Introduction — 1Child Safety — 4Safety Belts — 5Personal Safety System — 1Supplementary Restraints System — 6Keys and Remote Control — 4MyKey — 7Locks — 4Security — 3Steering Wheel — 1Wipers and Washers — 3Lighting — 9Windows and Mirrors — 6Instrument Cluster — 4Information Displays — 4Climate Control — 6Seats — 7Universal Garage Door Opener (If Equipped) — 3Auxiliary Power Points — 1Storage Compartments — 1Starting and Stopping the Engine — 5Fuel and Refueling — 8Transmission — 5Brakes — 4Traction Control — 1Stability Control — 1Parking Aids — 3Cruise Control — 1Driving Aids — 1Load Carrying — 1Towing — 6Convertible Top (If Equipped) — 4Driving Hints — 5Roadside Emergencies — 5Customer Assistance — 9Fuses — 3Maintenance — 19Vehicle Care — 12Wheels and Tires — 10Capacities and Specifications — 8Accessories — 1Ford Extended Service Plan — 1Audio System — 6SYNC® — 8Navigation System (If Equipped) — 10Appendices — 1Scheduled Maintenance — 1
~1min read

Choosing the Right Fuel

Use only unleaded fuel or unleaded fuel blended with a maximum of 15% ethanol. Do not use fuel ethanol (E85), diesel fuel, fuel- methanol, leaded fuel or any other fuel because it could damage or impair the emission control system.

Octane Recommendations

• 3.7L V6 engine
Regular unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as Regular with an octane rating below 87, particularly in high altitude areas. Do not use fuels with octane posted on pump below 87.

• 5.0L V8 engine
Regular unleaded gasoline with a pump (R+M)/2 octane rating of 87 is recommended. Some stations offer fuels posted as “Regular” with an octane rating below 87, particularly in high altitude areas. Fuels with octane levels below 87 are not recommended. Do not use fuels with octane posted on pump below 87.

Premium fuel will provide improved performance and is recommended for severe duty usage, such as trailer tow.

• For Shelby GT500 octane requirements, see the Shelby GT500 Supplement.
Do not be concerned if your engine sometimes knocks lightly. However, if it knocks heavily while you are using fuel with the recommended octane rating, see your authorized dealer to prevent any engine damage.

Test yourself

A quick Ford Mustang quiz: every answer comes with an explanation and a link to the manual page.