Jeep Cherokee 2009, Operating Information Manual

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Engine Oil Viscosity
SAE 5W-20 engine oil is recommended for all
operating temperatures. This engine oil improves
low temperature starting and vehicle fuel
economy.
The engine oil filler cap also shows the recom-
mended engine oil viscosity for your engine. For
information on engine oil filler cap location, refer to
the “Engine Compartment” illustration in this sec-
tion.
NOTE:
SAE 5W-30 engine oil approved to MB 229.31
or MB 229.51 may be used when SAE 5W-20
engine oil is not available.
Synthetic Engine Oils
You may use synthetic engine oils provided the
recommended oil quality requirements are met,
and the recommended maintenance intervals for
oil and filter changes are followed.
Materials Added To Engine Oils
Do not add any additives (other than leak detec-
tion dyes) to the engine oil. Engine oil is an
engineered product and its performance may be
impaired by supplemental additives.
Disposing of Used Engine Oil and Oil Filters
Care should be taken in disposing of used engine
oil and oil filters from your vehicle. Used oil and oil
filters, indiscriminately discarded, can present a
problem to the environment. Contact your autho-
rized dealer, service station, or governmental
agency for advice on how and where used oil and
oil filters can be safely discarded in your area.
Engine Oil Filter
The engine oil filter should be replaced at every
engine oil change.
Engine Oil Filter Selection
All of the manufacturer’s engines have a full-flow
type disposable oil filter. Use a filter of this type for
replacement. The quality of replacement filters
varies considerably. Only high quality filters
should be used to assure most efficient service.
Mopar
!
engine oil filters are high quality oil filters
and are recommended.
Drive Belts — Check Condition and
Tension
Belt tension is controlled by means of an auto-
matic tensioner. Therefore, no belt tension adjust-
ments are required. However, belt and belt ten-
sioner condition should be inspected periodically
and replaced if required. Improper belt tension
can cause belt slippage and failure. Low genera-
tor belt tension can cause battery failure.
Inspect belts for evidence of cuts, cracks, glaz-
ing, or frayed cords and replaced if there is
indication of damage, which could result in belt
failure. Also, check belt routing to make sure there
is no interference between the belts and other
engine components. See your authorized dealer
for service.
Spark Plugs
Spark plugs must fire properly to assure engine
performance and emission control. New spark
plugs should be installed at the specified mileage.
The entire set should be replaced if there is any
malfunction due to a faulty spark plug. Malfunc-
tioning spark plugs can damage the catalytic
converter. Refer to “Fluids, Lubricants, and Genu-
ine Parts” in this section for the proper type of
spark plug for use in your vehicle.
Engine Air Cleaner Filter
Refer to the “Maintenance Schedule” in Section 8
of this manual for engine air cleaner filter mainte-
nance intervals.
NOTE:
Be sure to follow the “dusty or off-road condi-
tions” maintenance interval if applicable.
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