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Dodge 2004 Ram Pickup 3500 User Manual

Page 327

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• 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).

If ANY of these apply to you, then change your engine oil
at every interval shown in schedule

ЉBЉ of the ЉMainte-

nance Schedules

Љ section of this manual.

If none of these apply to you, then change your engine oil
at every interval shown on schedule

ЉAЉ of the ЉMainte-

nance Schedules

Љ section of this manual.

NOTE:

Most vehicles are operated under the conditions

listed for Schedule

ЉB.Љ

Engine Oil Selection

1. Engine Oil Quality

Use only oils conforming to API
Service CI-4. A sulfated ash limit
is specified for lubrication oil used
in Cummins engines. Oils with a
high ash content may produce de-
posits 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:

MAINTAINING YOUR VEHICLE

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