2008 JEEP WRANGLER Owners Manual

FLUID CAPACITIES
U.S.Metric
Fuel (Approximate) — 2–Door Models 18.5 Gallons70 Liters
Fuel (Approximate) — 4–Door Models 22.5 Gallons85 Liters
Engine Oil with Filter
3.8 Liter Engine (SAE 5W-20, API Certified Engine Oil) 6 Quarts5.7 Liters
Cooling System *
3.8 Liter Engine (MOPAR Antifreeze/Engine Coolant 5 Year/
100,000 Mile Formula) 13 Quarts
12 Liters
* Includes heater and coolant recovery bottle filled to MAX level.
424 MAINTAINING YOUR VEHICLE

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine Coolant MOPARAntifreeze/Coolant 5 Year/100,000 Mile Formula HOAT (Hybrid
Organic Additive Technology)
Engine Oil Use API Certified SAE 5W-20 Engine Oil, meeting the requirements of
DaimlerChrysler Material Standard MS-6395. Refer to your engine oil filler cap
for correct SAE grade.
Spark Plugs (3.8L Engine) RE14PLP5 (Gap 0.050 in [1.27 mm])
Oil Filter (3.8L Engine) MOPAROil Filter (P/N 04105409AC)
Fuel Selection 87 Octane
MAINTAINING YOUR VEHICLE 425
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Chassis
ComponentFluid, Lubricant, or Genuine Part
Automatic Transmission MOPARATF+4 Automatic Transmission Fluid
Manual Transmission MOPARManual Transmission Lubricant or equivalent (meeting the require-
ments of DaimlerChrysler Material Standard MS-9224)
Transfer Case MOPARATF+4 Automatic Transmission Fluid or equivalent.
Axle Differential (Front) MOPARGear & Axle Lubricant (SAE 80W-90) (API GL-5) or equivalent.
Axle Differential (Rear) 198 RBI (Model 35) and 226 RBI (Model 44) - MOPARGear & Axle Lubri-
cant (SAE 80W-90) (API GL-5) or equivalent. For trailer towing, use MOPAR
Synthetic Gear & Axle Lubricant (SAE 75W-140) or equivalent. Models
equipped with Trac-Lok™ require an additive.
Brake Master Cylinder MOPARDOT 3 Brake Fluid, SAE J1703 should be used. If DOT 3, SAE
J1703 brake fluid is not available, then DOT 4 is acceptable. Use only recom-
mended brake fluids.
Power Steering Reservoir MOPARATF+4 Automatic Transmission Fluid
426 MAINTAINING YOUR VEHICLE

MAINTENANCE SCHEDULES
CONTENTS
Emissions Control System Maintenance .......428
 Maintenance Schedule ...................428 ▫
Required Maintenance Intervals ...........431
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EMISSIONS CONTROL SYSTEM MAINTENANCE
The Scheduled Maintenance services listed inbold type
must be done at the times or mileages specified to ensure
the continued proper functioning of the emission control
system. These, and all other maintenance services in-
cluded in this manual, should be done to provide best
vehicle performance and reliability. More frequent main-
tenance may be needed for vehicles in severe operating
conditions, such as dusty areas and very short trip
driving.
Inspection and service should also be done any time a
malfunction is suspected.
NOTE: Maintenance, replacement, or repair of the emis-
sions control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part that has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULE
The oil change indicator system will remind you that it is
time to take your vehicle in for scheduled maintenance.
On Non-EVIC equipped vehicles “CHANgE OIL” will
flash in the instrument cluster odometer and a single
chime will sound, indicating that an oil change is neces-
sary.
Based on engine operation conditions the oil change
indicator message will illuminate, this means that service
is required for your vehicle. Have your vehicle serviced
as soon as possible, within the next 500 mi (805 km).
NOTE:
•The oil change indicator message will not monitor the
time since the last oil change. Change your vehicles oil
if it has been 6 months since your last oil change even
if the oil change indicator message is NOT illumi-
nated.
428 MAINTENANCE SCHEDULES
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•Change your engine oil more often if you drive your
vehicle off-road for an extended period of time.
•Under no circumstances should oil change intervals
exceed 6,000 mi (10,000 km) or 6 months, whichever
comes first.
Your dealer will reset the oil change indicator message
after completing the scheduled oil change. If this sched-
uled oil change is performed by someone other than your
dealer the message can be reset by referring to the steps
described under “Odometer/Trip Odometer” in the “In-
strument Cluster Description” section of this manual.
At Each Stop for Fuel
•Check the engine oil level about 5 minutes after a fully
warmed engine is shut off. Checking the oil level while
the vehicle is on level ground will improve the accu-
racy of the oil level reading. Add oil only when the
level is at or below the ADD or MIN mark.
•Check the windshield washer solvent and add if
required.
Once a Month
•Check tire pressure and look for unusual wear or
damage.
•Inspect the battery and clean and tighten the terminals
as required.
•Check the fluid levels of coolant reservoir, brake
master cylinder, power steering and transmission and
add as needed.
•Check all lights and other electrical items for correct
operation.
MAINTENANCE SCHEDULES 429
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At Each Oil Change
•Change the engine oil filter.
•Inspect the brake hoses and lines.
•Check the manual transmission fluid level.
CAUTION!
Failure to perform the required maintenance items
may result in damage to the vehicle.
430 MAINTENANCE SCHEDULES
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Required Maintenance Intervals
Perform Maintenance Every(Where time and mileage
are listed, follow the interval that occurs first.)
Maintenance Items MilesKilometers or Months
Change the engine oil and engine oil filter. 6,00010 000 6
Rotate tires. 6,00010 000 6
If using your vehicle for any of the following: Dusty
or off-road conditions. Inspect the engine air cleaner
filter, replace if necessary. 12,000
20 000 12
Inspect the brake linings, replace if necessary. 12,00020 000 12
Replace the air conditioning filter. 12,00020 000 12
Inspect the front & rear axle fluid, change if using
your vehicle for police, taxi, fleet, off-road or frequent
trailer towing. 18,000
30 000 18
Inspect the CV joints. Perform the first inspection at
12,000 mi (20 000 km) or 12 months. 24,000
40 000 24
Inspect exhaust system. Perform the first inspection at
12,000 mi (20 000 km) or 12 months. 24,000
40 000 24
MAINTENANCE SCHEDULES 431
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