IfANY of these apply to you, then change your engine oil
at every interval shown in schedule Bof the Mainte-
nance Schedules section of this manual.
If none of these apply to you, then change your engine oil
at every interval shown on schedule Aof the Mainte-
nance Schedules section of this manual.
NOTE: Most vehicles are operated under the conditions
listed for Schedule B.
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 sulfated 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:
NOTE:
The same oil change interval is to be followed
for synthetic oil as for petroleum based oil. Also, syn-
thetic oil must meet the same performance specifications
as petroleum oil.
MAINTAINING YOUR VEHICLE 385
7
Noise Control Maintenance .......................... 417
Tampering Prohibited ................... 418
Noise Emission Warranty ...............417,419
Occupant Restraints ....................... 31
Occupant Restraints (2500/3500/Mega Cab Only) . . 31
Odometer .......................... 182,186
Trip ............................. 182,186
Off-Pavement Driving (Off-Road) ............ 289
Off-Road Driving (Off-Pavement) ............ 289
Oil, Engine ............................ 446
Capacity ............................ 445
Change Interval ....................... 384
Dipstick ............................. 383
Disposal ............................ 389
Filter ......................... 383,386,446
Materials Added to ..................... 386
Pressure Gauge ....................... 180 Recommendation
...................... 385
Viscosity ............................ 385
Oil Filter, Change ........................ 386
Onboard Diagnostic System ................ 379
Opener, Garage Door (HomeLink ) ........... 143
Operating Precautions .................... 379
Out of Park Sense Alarm .................. 273
Outside Rearview Mirrors .................. 83
Overdrive ............................. 270
Overdrive OFF Switch .................... 270
Overhead Console .................... 136,137
Overhead Travel Information Center .......... 137
Owner’s Manual (Operator Manual) .......... 474
Panic Alarm ............................ 22
Parking Brake .......................... 290
Passenger Airbag On/Off Switch ............. 51
Passing Light ........................... 128
Pedals, Adjustable ....................... 132
INDEX 487
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