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Heavy Duty Use Of The Vehicle
Change engine oil at 4,000 miles (6,500 km) or
350 hours of engine run time if the vehicle is
operated in a dusty and off road environment or
is operated predominately at idle or only very
low engine RPM’ s. This type of vehicle use is
considered Severe Duty.
SCHEDULED SERVICING – SRT
The Scheduled Maintenance services listed in
this manual must be done at the times or
mileages specified to protect your vehicle war-
ranty and ensure the best vehicle performance
and reliability. More frequent maintenance may
be needed for vehicles in severe operating con-
ditions, such as dusty areas and very short trip
driving. Inspection and service should also be
done anytime a malfunction is suspected.
The oil change indicator system will remind you
that it is time to take your vehicle in for sched-
uled maintenance.
The instrument cluster display will display an
“Oil Change Required” message and a single
chime will sound, indicating that an oil change
is necessary.
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 miles (800 km).
NOTE:
• The oil change indicator message will not
monitor the time since the last oil change.
Change your vehicle's oil if it has been six
months since your last oil change, even if the
oil change indicator message is NOT illumi-
nated.
• 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 miles (10,000 km) or
six months, whichever comes first.
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 refer-
ring to the steps described under “Instrument
Cluster Display” in “Getting To Know Y our In-
strument Panel” in this guide.
SERVICING AND MAINTENANCE
198
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