FORD 2014 Focus v.1 - Manual (Page 154)

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.
Choosing the Right Fuel With a Flex Fuel Vehicle (If Equipped)
Note: If your vehicle is flex fuel capable, it will have a yellow bezel
placed over the fuel fill inlet.
Flex fuel vehicles are designed to use unleaded gasoline or an ethanol
fuel blend that contain up to 85% ethanol. It is also acceptable to use
any mixture of unleaded gasoline and ethanol fuel that contains up to
85% ethanol. An ethanol fuel blend that contains 85% ethanol is labeled
as E85 at the service station.
It is best not to alternate repeatedly between gasoline and E85.
If you do switch fuels, it is recommended that you add as much fuel as
possible—at least half a tank. Do not add less than five gallons
(18.9 liters) when refueling. You should drive the vehicle immediately
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.
Octane Recommendations
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 be concerned if your engine sometimes knocks lightly. However,
if it knocks heavily under most driving conditions while you are using
fuel with the recommended octane rating, see your authorized dealer to
prevent any engine damage.
87
(R+M)/2 METHOD
Fuel and Refueling 153
2014 Focus (foc)
Owners Guide gf, 1st Printing, October 2012
USA (fus)