Ford Mustang Owners Manual: Fuel quality
Note
: Use of any fuel other than those recommended may cause powertrain damage and a loss of vehicle performance; repairs may not be covered under warranty.
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.
Safety precautions
WARNING: Do not overfill the fuel tank. The pressure in an overfilled
tank may cause leakage and lead to fuel spray and fire.
WARNING: The fuel system may be under pressure. If you hear a hissing
...
Running out of fuel
Avoid running out of fuel because this situation may have an adverse effect on
powertrain components.
If you have run out of fuel:
• You may need to cycle the ignition from off to on several times ...
Other materials:
Fuel quality
Note: Use of any fuel other than those recommended may cause powertrain
damage and a loss of vehicle performance; repairs may not be covered under warranty.
Choosing the Right Fuel
Use only unleaded fuel or unleaded fuel blended with a maximum of 15% ethan ...
Audible warnings and indicators
Key In Ignition Warning Chime
Sounds when the key is left in the ignition in the off or accessory position
and the driver’s door is opened.
Keyless Warning Alert (If Equipped)
Sounds when the keyless vehicle is in RUN and the driver’s door is opened.
Hea ...
Roadside assistance
Vehicles Sold in the U.S.: Getting Roadside Assistance
To fully assist you should you have a vehicle concern, Ford Motor Company offers
a complimentary roadside assistance program.
This program is separate from the New Vehicle Limited Warranty.
The servic ...