Page 363 of 376
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
2008 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
363
Page 366 of 376

GENUINE MERCURY ACCESSORIES FOR YOUR VEHICLE
A wide selection of Genuine Mercury Accessories are available for your
vehicle through your local Mercury or Ford of Canada dealer. These
quality accessories have been specifically engineered to fulfill your
automotive needs; they are custom designed to complement the style
and aerodynamic appearance of your vehicle. In addition, each accessory
is made from high quality materials and meets or exceeds Mercury’s
rigorous engineering and safety specifications. Ford Motor Company will
repair or replace any properly dealer-installed Genuine Mercury
Accessories found to be defective in factory-supplied materials or
workmanship during the warranty period, as well as any component
damaged by the defective accessories. The accessories will be warranted
for whichever provides you the greatest benefit:
•12 months or 12,000 miles (20,000 km) (whichever occurs first), or
•the remainder of your new vehicle limited warranty.
Contact your dealer for details and a copy of the warranty.
Following is a list of several Genuine Mercury Accessories. Not all
accessories are available for all models. To find out what accessories are
available for your vehicle, please contact your dealer or visit our online
store at: www.mercuryaccessories.com.
Exterior style
Aluminum fuel filler door
Bug shields
Deflectors
Running boards
Splash guards
Step Bars
Interior style
Electrochromatic compass/temperature interior mirrors
Floor mats
Lifestyle
Ash cup / smoker’s package
Cargo organization and management
Neutral tow kit
2008 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Accessories
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Page 370 of 376

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
2008 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Index
370