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.
In high altitude areas, we do not
recommend the use of any “Regular”
fuel with an octane rating below 87.
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, try a different brand of 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
rating. These products have not been approved for your engine and
87(R+M)/2 METHOD
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
289
The advertised capacity is the amount of the indicated capacity and the
empty reserve combined. Indicated capacity is the difference in the
amount of fuel in a full tank and a tank when the fuel gauge indicates
empty. Empty reserve is the small amount of fuel remaining in the fuel
tank after the fuel gauge indicates empty.
The amount of usable fuel in the empty reserve varies and should
not be relied upon to increase driving range. 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.
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.
•Use the same filling rate setting (low — medium — high) each time
the tank is filled.
•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.
•Use the same side of the same pump and have the vehicle facing the
same direction each time you fill up.
•Have the vehicle loading and distribution the same every time.
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.
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
292
ENGINE DATA
Engine 3.5L-DOHC V6 engine
Cubic inches 214
Required fuel 87 octane
Firing order 1–4–2–5–3–6
Spark plug gap 0.052–0.056 inch (1.32–1.42 mm)
Ignition system Coil on plug
Compression ratio 10.3:1
Engine drivebelt routing
1. Short drivebelt is on first pulley groove closest to engine.
2. Long drivebelt is on second pulley groove farthest from engine.
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Maintenance and Specifications
305
fail-safe cooling .......................284
idle speed control ...................278
lubrication specifications .......302
refill capacities ........................302
service points ..........................272
starting after a collision .........233
Engine block heater .................201
Engine oil ..................................274
change oil soon warning,
message center .......................274
checking and adding ..............274
dipstick ....................................274
filter, specifications ........277, 301
recommendations ...................277
refill capacities ........................302
specifications ..........................302
Event data recording ....................7
Exhaust fumes ..........................201
F
Fail safe cooling ........................284
Floor mats ...................................87
Fluid capacities .........................302
Fog lamps ....................................54
Four-Wheel Drive vehicles
driving off road .......................226
Fuel ............................................286
calculating fuel
economy ............................20, 291
cap ...........................................288
capacity ...................................302
choosing the right fuel ...........289
comparisons with EPA fuel
economy estimates .................294
detergent in fuel .....................290
filler funnel .............................290
filling your vehicle with
fuel ...........................286, 288, 291filter, specifications ........285, 301
fuel pump shut-off switch .....233
improving fuel economy ........291
octane rating ...................289, 305
quality ......................................289
running out of fuel .........248, 290
safety information relating to
automotive fuels .....................286
Fuel pump shut-off switch .......233
Fuses ..................................234–235
G
Gas cap (see Fuel cap) ............288
Gas mileage (see Fuel
economy) ...................................291
Gauges .........................................17
H
Hazard flashers .........................233
Headlamps ...................................53
aiming ........................................56
autolamp system .......................53
bulb specifications ....................59
daytime running lights .............54
flash to pass ..............................55
high beam .................................55
replacing bulbs .........................61
turning on and off ....................53
Heating
heating and air conditioning
system .................................45, 48
Homelink wireless control
system ..........................................83
Hood ..........................................271
I
Ignition ...............................198, 305
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Index
315
Illuminated visor mirror .............69
Infant seats
(see Safety seats) .....................156
Inspection/maintenance (I/M)
testing ........................................296
Instrument panel
cleaning ...................................266
cluster ........................................12
lighting up panel and
interior .......................................55
J
Jack ............................................241
positioning ...............................241
storage .....................................241
Jump-starting your vehicle ......248
K
Keyless entry system
autolock .....................................90
keypad .....................................102
locking and unlocking
doors ........................................103
programming entry code .......102
Keys .....................................88, 105
positions of the ignition .........198
L
Lamps
autolamp system .......................53
bulb replacement
specifications chart ..................59
daytime running light ...............54
fog lamps ...................................54
headlamps .................................53
headlamps, flash to pass ..........55
instrument panel, dimming .....55
interior lamps ...........................58replacing bulbs .........................61
LATCH anchors .........................162
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........204
Load limits .................................191
Locks
autolock .....................................90
childproof ..................................94
doors ..........................................90
Lubricant specifications ...........302
Lug nuts ....................................247
Lumbar support, seats .............114
M
Message center .....................18–19
english/metric button ...............23
system check button ................21
warning messages .....................25
Mirrors .........................................76
automatic dimming rearview
mirror ........................................76
heated ........................................77
programmable memory ............98
side view mirrors (power) .......76
Moon roof ....................................82
Motorcraft parts ................269, 301
N
Navigation system .......................44
O
Octane rating ............................289
Oil (see Engine oil) ..................274
P
Parking brake ............................204
2010 MKZ(378)
Owners Guide, 1st Printing
USA(fus)
Index
316