Octane Recommendations
3.5L V6 EcoBoost, 3.7L V6 TiVCT and 2.0L I4 EcoBoost Engines
We recommend regular unleaded gasoline with a pump (R+M)/2 octane
rating of 87. Some stations offer fuels posted as regular with an octane
rating below 87, particularly in high altitude areas. We do not recommend
fuels with octane levels below 87. To provide improved performance, we
recommend premium fuel for severe duty usage such as trailer tow.
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, contact an authorized dealer to prevent any engine damage.
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 after
refueling to allow the fuel system to pump the fuel from the tank to
the engine. On restarting, crank time will be a few seconds longer
than normal. With keyless ignition, just start the engine. Crank time
will be longer than usual.
•
Normally, adding 1 gallon (3.8 liters) of fuel is enough to restart the
engine. If the vehicle is out of fuel and on a steep grade, more than
1 gallon (3.8 liters) may be required.
•
The service engine soon indicator may come on. For more information
on the service engine soon indicator, see
Warning Lamps and
Indicators
in the
Instrument Cluster
chapter.
Refilling with a Portable Fuel Container
WARNING:
Do not insert the nozzle of a portable fuel container
or aftermarket funnel into the capless fuel system. This could
damage the fuel system and its seal, and may cause fuel to run onto the
ground instead of filling the tank, which could result in serious personal
injury.
WARNING:
Do not try to pry open or push open the capless fuel
system with foreign objects. This could damage the fuel system
and its seal and cause injury to you or others.
Fuel and Refueling
179
2015 MKT
(mkt)
Owners Guide gf, 1st Printing, October 2014
USA
(fus)
