2004 Dodge Ram 3500 Pickup Owner Manual Diesel - Page 327

•

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

²

B

²

of the

²

Mainte-

nance Schedules

²

section of this manual.

If none of these apply to you, then change your engine oil

at every interval shown on schedule

²

A

²

of the

²

Mainte-

nance Schedules

²

section of this manual.

NOTE:

Most vehicles are operated under the conditions

listed for Schedule

²

B.

²

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

327

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2004 Dodge Ram 3500 Pickup Owner Manual Diesel - Page 327

2004 Dodge Ram 3500 Pickup Manual

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