•Driving in dusty conditions.
•Frequent trailer towing.
•Taxi, police, or delivery service (commercial service).
•Off-road or desert operation.
•Extensive operation at high engine speeds (greater
than 2900 rpm) and loads (greater than 70% throttle).
IfANYof these apply to you, then change your engine oil
at every interval shown in scheduleBof theMainte-
nance Schedulessection of this manual.
If none of these apply to you, then change your engine oil
at every interval shown on scheduleAof theMainte-
nance Schedulessection of this manual.
NOTE:Most vehicles are operated under the conditions
listed for ScheduleB.
Engine Oil Selection
1. Engine Oil Quality
Use only oils conforming to API Ser-
vice CI-4. A sulfated ash limit is speci-
fied for lubrication oil used in Cum-
mins engines. Oils with a high ash
content may produce deposits on
valves that can progress to guttering
and valve burning. A maximum sul-
fated ash content of 1.85 mass % is recommended for all
oil used in the engine.
2. Engine Oil Viscosity (SAE Grade)
The proper SAE viscosity of engine oil for the expected
ambient temperature range should be selected, as indi-
cated in the following chart:
MAINTAINING YOUR VEHICLE 381
7
Manual, Service......................... 474
Manual Transmission..................272,406
Fluid Level Check...................... 406
Lubricant Selection..................... 439
Mirrors................................ 78
Automatic Dimming..................... 79
Electric Powered....................... 80
Outside.............................. 79
Rearview............................. 78
Trailer Towing......................81,334
Modifications/Alterations, Vehicle............. 7
Mopar Parts.........................375,473
Multi-Function Control Lever............... 124
New Vehicle Break-In Period................ 69
Noise Control
Maintenance.......................... 411
Tampering Prohibited................... 412
Noise Emission Warranty............... 411,413Occupant Restraints....................... 30
Occupant Restraints (2500/3500/Mega Cab Only) . . 30
Odometer..........................180,184
Trip .............................180,184
Off-Pavement Driving (Off-Road)............ 346
Off-Road Driving (Off-Pavement)............ 346
Oil, Engine............................ 438
Capacity............................ 437
Change Interval....................... 380
Dipstick............................. 379
Disposal............................ 384
Filter.........................379,382,438
Pressure Gauge....................... 178
Recommendation...................... 381
Viscosity............................ 381
Oil Filter, Change........................ 382
Onboard Diagnostic System................ 375
Opener, Garage Door (HomeLink) ........... 141
Operating Precautions.................... 375
486 INDEX
