WARNING:The fuel system may be under pressure. If you hear
a hissing sound near the fuel filler door (Easy Fuel™ “no cap”
fuel system), do not refuel until the sound stops. Otherwise, fuel may
spray out, which could cause serious personal injury.
Choosing the right fuel
Use only UNLEADED fuel or UNLEADED fuel blended with a maximum
of 10% ethanol. Do not use fuel ethanol (E85), diesel, methanol, leaded
fuel or any other fuel. The use of leaded fuel is prohibited by law and
could damage your vehicle.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives.
Note:Use of any fuel other than those recommended may cause
powertrain damage, a loss of vehicle performance, and repairs may not
be covered under warranty.
Octane recommendations
Your vehicle is designed to use
“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. 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.
Fuel quality
If you are experiencing starting, rough idle or hesitation driveability
problems during a cold start, try a different brand of “Regular” unleaded
gasoline. Premium unleaded gasoline is not recommended for vehicles
designed to use “Regular” unleaded gasoline because it may cause these
problems to become more pronounced. If the problems persist, see your
authorized dealer.
Do not add aftermarket fuel additive products to your fuel tank. It
should not be necessary to add any aftermarket products to your fuel
tank if you continue to use high quality fuel of the recommended octane
87(R+M)/2 METHOD
Maintenance and Specifications
301
2011 MKZ Hybrid(hkz)
Owners Guide, 2nd Printing
USA(fus)
Filling the tank
When the fuel gauge indicates empty, there is still a small reserve of fuel
in the fuel system. When refueling your vehicle after the fuel gauge
indicates empty, you might not be able to refuel the full amount of the
advertised capacity of the fuel tank due to the empty reserve still
present in the tank. The amount of usable fuel in the empty reserve
varies and should not be relied upon to increase driving range.
For consistent results when filling the fuel tank:
•Turn the engine/ignition switch to the off position prior to refueling;
an error in the reading will result if the engine is left running.
•Allow no more than two automatic click-offs when filling.
•Always use fuel with the recommended octane rating.
•Use a known quality gasoline, preferably a national brand.
Your results will be most accurate if your filling method is consistent.
Calculating fuel economy
1. Fill the fuel tank completely and record the initial odometer reading
(in miles or kilometers).
2. Each time you fill the tank, record the amount of fuel added (in
gallons or liters).
3. After at least three to five tank fill-ups, fill the fuel tank and record
the current odometer reading.
4. Subtract your initial odometer reading from the current odometer
reading.
5. Follow one of the simple calculations in order to determine fuel
economy:
Calculation 1:Divide total miles traveled by total gallons used.
Calculation 2:Multiply liters used by 100, then divide by total
kilometers traveled.
Keep a record for at least one month and record the type of driving (city
or highway). This will provide an accurate estimate of the vehicle’s fuel
economy under current driving conditions. Additionally, keeping records
during summer and winter will show how temperature impacts fuel
economy. In general, very hot or very cold temperatures give lower fuel
economy.
Maintenance and Specifications
304
2011 MKZ Hybrid(hkz)
Owners Guide, 2nd Printing
USA(fus)
ENGINE DATA
Engine 2.5L I4 engine
Cubic inches 152
Required fuel Minimum 87 octane
Firing order 1-3-4-2
Ignition system Coil on plug
Spark plug gap 0.049–0.053 inch (1.25–1.35mm)
Compression ratio 12.3:1
Engine drivebelt routing
High voltage battery data
High voltage battery
Battery chemistry Nickel metal hydride
Nominal voltage 275 volts
Battery system capacity 5.5 amp-hours
Maintenance and Specifications
315
2011 MKZ Hybrid(hkz)
Owners Guide, 2nd Printing
USA(fus)
Engine block heater .................221
Engine oil ..................................288
checking and adding ..............288
dipstick ....................................288
filter, specifications ........289, 312
recommendations ...................289
refill capacities ........................313
specifications ..........................313
Event data recording ..................12
Exhaust fumes ..........................221
F
Fleet MyKey programming ......109
Floor mats .................................107
Fluid capacities .........................313
Fog lamps ....................................77
Fuel ............................................298
calculating fuel
economy ............................38, 303
cap ...........................................300
capacity ...................................313
choosing the right fuel ...........301
detergent in fuel .....................302
filler funnel .............................302
filling your vehicle with
fuel ...........................298, 300, 304
filter, specifications ........297, 312
fuel pump shut-off ..................248
improving fuel economy ........303
octane rating ...................301, 315
quality ......................................301
running out of fuel .........262, 302
safety information relating to
automotive fuels .....................298
Fuses ..................................248–249G
Garage door opener ..................101
Gas cap (see Fuel cap) ............300
Gas mileage
(see Fuel economy) .................303
Gauges .........................................25
H
Hazard flashers .........................247
Headlamps ...................................75
aiming ..................................78–79
autolamp system .......................76
bulb specifications ....................82
daytime running lights .............78
flash to pass ..............................77
high beam .................................77
replacing bulbs .........................83
turning on and off ....................75
Heating
heating and air conditioning
system .................................67, 70
Hood ..........................................285
I
Ignition ...............................218, 315
Illuminated visor mirror .............89
Infant seats
(see Safety seats) .....................178
Inspection/maintenance (I/M)
testing ........................................308
Instrument panel
cleaning ...................................279
cluster ........................................18
lighting up panel
and interior ...............................78
Index
344
2011 MKZ Hybrid(hkz)
Owners Guide, 2nd Printing
USA(fus)
J
Jack ............................................256
positioning ...............................256
storage .....................................256
Jump-starting your vehicle ......263
K
Keyless entry system
autolock ...................................113
keypad .....................................125
locking and unlocking
doors ........................................126
programming entry code .......125
Keys ...................................108, 128
positions of the ignition .........218
L
Lamps
autolamp system .......................76
bulb replacement
specifications chart ..................82
daytime running light ...............78
fog lamps ...................................77
headlamps .................................75
headlamps, flash to pass ..........77
instrument panel, dimming .....78
interior lamps .....................80, 83
replacing bulbs .........................83
LATCH anchors .........................182
Lights, warning and indicator ....18
anti-lock brakes (ABS) ..........223
Load limits .................................210
Locks
autolock ...................................113
childproof ................................117
doors ........................................113
Lubricant specifications ...........313Lug nuts ....................................262
Lumbar support, seats .............137
M
Message center ...........................36
system check button ................45
warning messages .....................46
Mirrors .........................................95
automatic dimming rearview
mirror ........................................95
heated ..................................70, 96
programmable memory ..........121
side view mirrors (power) .......95
Moon roof ....................................99
Motorcraftparts ..............283, 312
MyKey ........................................109
N
Navigation system .......................66
O
Octane rating ............................301
Oil (see Engine oil) ..................288
P
Parental MyKey
programming .............................109
Parking brake ............................224
Parts
(see Motorcraftparts) ...........312
Passenger Occupant
Classification Sensor .................145
Power distribution box
(see Fuses) ...............................252
Power door locks ......................113
Index
345
2011 MKZ Hybrid(hkz)
Owners Guide, 2nd Printing
USA(fus)