Engine Oil - Diesel Engine - Jeep Cherokee Operating Information Manual

CAUTION!
Do not use chemical flushes in your engine oil
as the chemicals can damage your engine.
Such damage is not covered by the New
Vehicle Limited Warranty.
Engine Oil Selection – ACEA Categories
For countries that use the ACEA European Oil
Categories for Service Fill Oils, use engine oils
that meet the requirements of ACEA C3, and
that are approved to MB 229.31 or MB 229.51.
Engine Oil Viscosity – 3.7L Engine
SAE 5W-20 engine oil is recommended for all
operating temperatures. This engine oil im-
proves 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 "Engine Compartment" in "Maintaining
Your Vehicle" for further information.
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 supplemental materials, other
than leak detection dyes, to your engine oil.
Engine oil is an engineered product and it's
performance may be impaired by supplemen-
tal 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 authorized 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 – Diesel Engine
Checking Oil Level
To assure proper engine lubrication, the engine
oil must be maintained at the correct level.
Check the oil level at regular intervals, such as
every fuel stop.
The best time to check the engine oil level is
about five minutes after a fully warmed engine
is shut off or before starting the engine after it
has sat overnight.
For vehicles equipped with a Diesel Particulate
Filter (DPF), it is acceptable to have an oil level
up to 3/8 inch (10 mm) above the MAX line.
Beyond 3/8 inch (10 mm) it is recommended to
change the oil.
Checking the oil while the vehicle is on level
ground will improve the accuracy of the oil level
readings. Maintain the oil level between the
MIN and MAX markings on the dipstick. Adding
1 U.S. Quart (0.95 L) of oil when the reading is
at the MIN mark will result in a MAX reading on
these engines.
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