Page 290 of 344
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
4.0L SOHC V6 engine
1. Engine oil filler cap
2. Engine oil dipstick (out of view)
3. Brake fluid reservoir
4. Power distribution box
5. Battery
6. Power steering fluid reservoir
7. Radiator cap
8. Engine coolant reservoir
9. Air filter assembly
10. Washer fluid reservoir
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
290
Page 291 of 344
4.6L V8 engine
1. Air filter assembly
2. Engine oil filler cap
3. Engine oil dipstick
4. Brake fluid reservoir
5. Power distribution box
6. Battery
7. Power steering fluid reservoir
8. Radiator cap
9. Engine coolant reservoir
10. Windshield washer fluid reservoir
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
291
Page 293 of 344

CHANGING THE WIPER BLADES
1. Pull the wiper arm away from the
vehicle. Turn the blade at an angle
from the wiper arm. Push the lock
pin manually to release the blade
and pull the wiper blade down
toward the windshield to remove it
from the arm.
2. Attach the new wiper to the
wiper arm and press it into place
until a click is heard.
Replace wiper blades at least once
per year for optimum performance.
Poor wiper quality can be improved
by cleaning the wiper blades and
the windshield, refer toWindows
and wiper bladesin theCleaningchapter.
To prolong the life of the wiper blades, it is highly recommended to
scrape off the ice on the windshield before turning on the wipers. The
layer of ice has many sharp edges and can damage the micro edge of the
wiper rubber element.
ENGINE OIL
Checking the engine oil
Refer to thescheduled maintenance informationfor the appropriate
intervals for checking the engine oil.
1. Make sure the vehicle is on level ground.
2. Turn the engine off and wait a few minutes for the oil to drain into the
oil pan.
3. Set the parking brake and ensure the gearshift is securely latched in P
(Park).
4. Open the hood. Protect yourself from engine heat.
5. Locate and carefully remove the engine oil level indicator (dipstick).
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
293
Page 299 of 344

When lifting a plastic-cased battery, excessive pressure on the
end walls could cause acid to flow through the vent caps,
resulting in personal injury and/or damage to the vehicle or battery.
Lift the battery with a battery carrier or with your hands on opposite
corners.
Keep batteries out of reach of children. Batteries contain sulfuric
acid. Avoid contact with skin, eyes or clothing. Shield your eyes
when working near the battery to protect against possible splashing of
acid solution. In case of acid contact with skin or eyes, flush
immediately with water for a minimum of 15 minutes and get prompt
medical attention. If acid is swallowed, call a physician immediately.
Battery posts, terminals and related accessories contain lead and
lead compounds.Wash hands after handling.
Because your vehicle’s engine is electronically controlled by a computer,
some control conditions are maintained by power from the battery. When
the battery is disconnected or a new battery is installed, the engine must
relearn its idle and fuel trim strategy for optimum driveability and
performance. To begin this process:
1. With the vehicle at a complete stop, set the parking brake.
2. Put the gearshift in P (Park), turn off all accessories and start the
engine.
3. Run the engine until it reaches normal operating temperature.
4. Allow the engine to idle for at least one minute.
5. Turn the A/C on and allow the engine to idle for at least one minute.
6. Release the parking brake. With your foot on the brake pedal and with
the A/C on, put the vehicle in D (Drive) and allow the engine to idle for
at least one minute.
7. Drive the vehicle to complete the relearning process.
•The vehicle may need to be driven 10 miles (16 km) or more to
relearn the idle and fuel trim strategy.
•If you do not allow the engine to relearn its idle trim, the idle
quality of your vehicle may be adversely affected until the idle
trim is eventually relearned.
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
299
Page 313 of 344

•Revving the engine before turning it off may reduce fuel economy.
•Using the air conditioner or defroster may reduce fuel economy.
•You may want to turn off the speed control in hilly terrain if
unnecessary shifting between third and fourth gear occurs.
Unnecessary shifting of this type could result in reduced fuel
economy.
•Warming up a vehicle on cold mornings is not required and may
reduce fuel economy.
•Resting your foot on the brake pedal while driving may reduce fuel
economy.
•Combine errands and minimize stop-and-go driving.
Maintenance
•Keep tires properly inflated and use only recommended size.
•Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
•Use recommended engine oil. Refer toLubricant specificationsin
this chapter.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found inscheduled maintenance information.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
1 mpg [0.4 km/L] is lost for every 400 lb [180 kg] of weight carried).
•Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Four-wheel-drive operation (if equipped) is less fuel efficient than
two-wheel-drive operation.
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
313
Page 317 of 344

BRAKE FLUID
The fluid level will drop slowly as
the brakes wear, and will rise when
the brake components are replaced.
Fluid levels below the “MAX” line
that do not trigger the brake system
warning lamp are within the normal
operating range, there is no need to
add fluid. If the fluid levels are
outside of the normal operating
range, the performance of your
brake system could be
compromised, seek service from your authorized dealer immediately.
TRANSMISSION FLUID
Checking automatic transmission fluid
The automatic transmission does not have an underhood transmission
fluid dipstick.
Refer to yourscheduled maintenance informationfor scheduled
intervals for fluid checks and changes. Your transmission does not
consume fluid. However, the fluid level should be checked if the
transmission is not working properly, (i.e., if the transmission slips or
shifts slowly) or if you notice some sign of fluid leakage.
Transmission fluid should be checked and, if required, fluid
should be added by an authorized dealer.
Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
317
Page 321 of 344
REFILL CAPACITIES
Fluid Ford Part Name Application Capacity
Brake fluid Motorcraft High
Performance DOT 3
Motor Vehicle Brake
FluidAll Fill to the
MAX line on
reservoir
Engine oil
(including filter
change)
4
Motorcraft SAE
5W-30 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-30 Super
Premium Motor Oil
(Canada)4.0L 5.0 quarts
(4.7L)
Motorcraft SAE
5W-20 Premium
Synthetic Blend
Motor Oil (US)
Motorcraft SAE
5W-20 Super
Premium Motor Oil
(Canada)4.6L 6.0 quarts
(5.7L)
Fuel tank N/A All 22.5 gallons
(85.2L)
Power steering
fluidMotorcraft
MERCONAT FAll Fill between
MIN and
MAX lines on
reservoir
Transmission
fluid
1Motorcraft
MERCONVATFAutomatic
transmission
(5R55S)13.0 quarts
(12.3L)2
Transmission
fluid1Motorcraft
MERCONSP ATFAutomatic
transmission
(6R60)11.2 quarts
(10.6L)2
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
321
Page 323 of 344

2Indicates only approximate dry-fill capacity. Some applications may vary
based on cooler size and if equipped with an in-tank cooler. The amount
of transmission fluid and fluid level should be checked by a qualified
technician.
3Add the coolant type originally equipped in your vehicle.
4Use of synthetic or synthetic blend motor oil is not mandatory. Engine
oil need only have the API Certification mark and meet the requirements
of Ford specification WSS-M2C929-A (4.0L) or WSS-M2C930-A (4.6L).
LUBRICANT SPECIFICATIONS
ItemFord Part
Name or
equivalentFord Part
NumberFord
Specification
Brake fluidMotorcraft High
Performance
DOT 3 Motor
Vehicle Brake
FluidPM-1 or PM-1-C ESA-M6C25 -A
Body hinges,
latches, door
striker plates
and rotors, seat
tracks, fuel filler
door hinge and
spring, hood
latch, auxiliary
latch, seat
tracksMulti-Purpose
GreaseXG–4 or XL-5 ESB-M1C93–B
Door
weatherstripsSilicone Spray
LubricantXL-6 ESR-M13P4-A
Lock cylindersMotorcraft
Penetrating and
Lock LubricantXL-1 none
Driveshaft, slip
spline, universal
jointsPremium Long
Life GreaseXG-1-C ESA-M1C75-B
2006 Mountaineer(mnt)
Owners Guide (post-2002-fmt)
USA(fus)
Maintenance and Specifications
323