Jeep Grand Cherokee Operating Information Manual page 429

* The spark plug change interval is mileage
based only, yearly intervals do not apply.
† This maintenance is recommended by the
manufacturer to the owner, but is not required to
maintain emissions warranty.
WARNING!
• You can be badly injured working on or
around a motor vehicle. Do only service
work for which you have the knowledge
and the right equipment. If you have any
doubt about your ability to perform a ser-
vice job, take your vehicle to a competent
mechanic.
• Failure to properly inspect and maintain
your vehicle could result in a component
malfunction and effect vehicle handling
and performance. This could cause an
accident.
Severe Duty Conditions
†† Change the engine oil and engine oil filter at
every 4500 miles (7,500 km) or 12 months if
using your vehicle under any of the following
severe duty conditions:
• Stop and go driving.
• Driving in dusty conditions.
• Short trips of less than 10 miles (16 km).
• Trailer towing.
• Taxi, police, or delivery service (commercial
service).
• Off-road or desert operation.
Maintenance Schedule — Diesel
Engine
Your vehicle is equipped with an automatic oil
change indicator system. The oil change indica-
tor system will remind you that it is time to take
your vehicle in for scheduled maintenance.
Based on engine operation conditions, the oil
change indicator message will illuminate. This
means that service is required for your vehicle.
Operating conditions such as frequent short-
trips, trailer tow, extremely hot or cold ambient
temperatures will influence when the "Oil
Change Required" message is displayed.
Your authorized dealer will reset the oil change
indicator message after completing the sched-
uled oil change. If a scheduled oil change is
performed by someone other than your autho-
rized dealer, the message can be reset by
referring to the steps described under "Driver
Information Display (DID)/Oil Change Re-
quired" in "Understanding Your Instrument
Panel" for further information.
Engine Oil Filter Replacement
Residual oil in the housing may spill from the
housing when the new filter is installed if the
residual oil is not either removed from the
housing or enough time has not elapsed to
allow the oil to drain back into the engine. When
servicing the oil filter on this engine, carefully
remove the filter and use a suction gun to
remove any residual oil left in the housing or
wait about 30 minutes for the oil to drain back
into the engine.
To help you have the best driving experience
possible, the manufacturer has identified the
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