FORD 2013 Explorer v.4 - Manual (Page 215)

after refueling for at least 5 miles (8 kilometers) to allow the vehicle
to adapt to the change in ethanol concentration. If you exclusively use
E85 fuel, it is recommended to fill the fuel tank with regular unleaded
gasoline at each scheduled oil change.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives. The use of leaded fuel
is prohibited by law.
Octane recommendations
3.5L 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. Fuels with
octane levels below 87 are not recommended.
2.0L/3.5L EcoBoost® engines:
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. Premium fuel will provide
improved performance and is recommended 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, see your 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.
87
(R+M)/2 METHOD
214 Fuel and Refueling
2013 Explorer (exp)
Owners Guide gf, 4th Printing, November 2012
USA (fus)