2008 Mercury Mountaineer octane

The fuel system may be under pressure. Remove fuel filler cap
slowly. Otherwise, fuel may spray out and injure you or others.
If you do not use the proper fuel filler cap, excessive vacuum in
the fuel tank may damage the fuel system or cause the fuel cap
to disengage in a collision, which may result in personal injury.
Choosing the right fuel
Use only UNLEADED fuel or UNLEADED fuel blended with a maximum
of 10% ethanol. Your vehicle was not designed to run on E85 fuels that
are blended with a maximum of 85% ethanol. The use of leaded fuel is
prohibited by law and could damage your vehicle. Do not use fuel
containing methanol. It can damage critical fuel system components.
Your vehicle was not designed to use fuel or fuel additives with metallic
compounds, including manganese-based additives. Studies indicate that
these additives can cause your vehicle’s emission control system to
deteriorate more rapidly.
Repairs to correct the effects of using a fuel for which your vehicle was
not designed may not be covered by your warranty.
Octane recommendations
Your vehicle is designed to use
“Regular” unleaded gasoline with
pump (R+M)/2 octane rating of 87.
We do not recommend the use of
gasolines labeled as “Regular” that
are sold with octane ratings of 86 or lower in high altitude areas.
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.
87(R+M)/2 METHOD
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Maintenance and Specifications
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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
could cause damage to the fuel system. Repairs to correct the effects of
using an aftermarket product in your fuel may not be covered by your
warranty.
Many of the world’s automakers approved the World-Wide Fuel Charter
that recommends gasoline specifications to provide improved
performance and emission control system protection for your vehicle.
Gasolines that meet the World-Wide Fuel Charter should be used when
available. Ask your fuel supplier about gasolines that meet the
World-Wide Fuel Charter.
Cleaner air
Ford endorses the use of reformulated “cleaner-burning” gasolines to
improve air quality, per the recommendations in theChoosing the Right
Fuelsection.
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, cranking time will take a few seconds longer
than normal.
•Normally, adding 1 gallon (3.8L) of fuel is enough to restart the
engine. If the vehicle is out of fuel and on a steep grade, more than 1
gallon (3.8L) may be required.
•TheService engine soon
indicator may come on. For more
information on theService engine soon
indicator, refer to
Warning lights and chimesin theInstrument Clusterchapter.
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Maintenance and Specifications
347

ESSENTIALS OF GOOD FUEL ECONOMY
Measuring techniques
Your best source of information about actual fuel economy is you, the
driver. You must gather information as accurately and consistently as
possible. Fuel expense, frequency of fill-ups or fuel gauge readings are
NOT accurate as a measure of fuel economy. We do not recommend
taking fuel economy measurements during the first 1,000 miles (1,600
km) of driving (engine break-in period). You will get a more accurate
measurement after 2,000 miles–3,000 miles (3,000 km–5,000 km).
Filling the tank
The advertised fuel capacity of the fuel tank on your vehicle is equal to
the rated refill capacity of the fuel tank as listed in theMaintenance
product specifications and capacitiessection of this chapter.
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.
2008 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
348

ENGINE DATA
Engine 4.0L SOHC V6
engine4.6L 3V V8
engine
Cubic inches 245 281
Required fuel 87 octane 87 octane
Firing order 1-4-2-5-3-6 1-3-7-2-6-5-4-8
Ignition system EDIS Coil on Plug
Spark plug gap 0.052–0.056 inch
(1.32–1.42 mm)0.040–0.050 inch
(1.02–1.27 mm)
1
Compression ratio 9.7:1 9.8:11Spark plug gap is not adjustable
Engine drivebelt routing
•4.0L V6 Engine
•4.6L V8 Engine
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refill capacities ........................359
service points ..................325–326
starting after a collision .........280
Engine block heater .................251
Engine oil ..................................329
checking and adding ..............329
dipstick ....................................329
filter, specifications ........332, 358
recommendations ...................332
refill capacities ........................359
specifications ..........................359
Event data recording ....................7
Exhaust fumes ..........................250
F
Fail safe cooling ........................341
Family entertainment system ....49
Floor mats .................................131
Fluid capacities .........................359
Foglamps .....................................85
Four-Wheel Drive vehicles
driving off road .......................271
preparing to drive your
vehicle .....................................259
Fuel ............................................343
calculating fuel
economy ..........................117, 348
cap ...........................................345
capacity ...................................359
choosing the right fuel ...........346
comparisons with EPA fuel
economy estimates .................351
detergent in fuel .....................347
filling your vehicle
with fuel ..................343, 345, 348
filter, specifications ........342, 358
fuel pump shut-off switch .....280
improving fuel economy ........348octane rating ...................346, 363
quality ......................................346
running out of fuel .................347
safety information relating to
automotive fuels .....................343
Fuses ..................................282–283
G
Garage door opener ....................99
Gas cap (see Fuel cap) ............345
Gas mileage
(see Fuel economy) .................348
Gauges .........................................17
GAWR (Gross Axle Weight
Rating)
calculating ...............................239
GVWR (Gross Vehicle Weight
Rating)
calculating ...............................239
H
Hazard flashers .........................280
Head restraints .........................152
Headlamps ...................................85
aiming ........................................87
bulb specifications ....................90
daytime running lights .............86
flash to pass ..............................86
high beam .................................86
turning on and off ....................85
Heating
heating and air conditioning
system .................................77, 79
Homelink wireless control
system ........................................111
Hood ..........................................324
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Index
370

How to get going ........................20
I
Ignition ...............................247, 363
Illuminated visor mirror .............97
Infant seats (see Safety seats)...201
Inspection/maintenance (I/M)
testing ........................................353
Instrument panel
cleaning ...................................319
cluster ........................................12
J
Jack ....................................290, 293
positioning .......................290, 295
storage .............................290, 293
Jump-starting your vehicle ......300
K
Keyless entry system ...............146
autolock ...........................135, 137
keypad .....................................147
locking and unlocking doors ..148
programming entry code .......147
Keys ...........................................149
positions of the ignition .........247
L
Lamps
bulb replacement
specifications chart ..................90
daytime running light ...............86
fog lamps ...................................85
headlamps .................................85
interior lamps ...........................89
replacing bulbs .........................93
Liftgate ......................................133remote release ........................142
Lights, warning and indicator ....12
anti-lock brakes (ABS) ..........253
Load limits .................................233
Loading instructions .................239
Locks
autolock ...........................135, 137
childproof ................................140
doors ........................................135
Lubricant specifications ...........359
Lug nuts ....................................299
Luggage rack .............................134
Lumbar support, seats .....154, 156
M
Manual transmission
lubricant specifications ..........359
Message center .........................115
english/metric button .............120
system check button ..............119
warning messages ...................126
Mirrors ...............................102–103
automatic dimming rearview
mirror ......................................102
fold away .................................104
heated ......................................104
side view mirrors (power) .....103
Moon roof ..................................110
Motorcraft parts ........321, 342, 358
N
Navigation system .......................76
O
Octane rating ............................346
Oil (see Engine oil) ..................329
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Owners Guide (post-2002-fmt)
USA(fus)
Index
371