Motor oil is the lifeblood of her engine, giving lubrication and also cooling come a complicated system of quick moving mechanical components under far-reaching load. Regimen oil transforms ensure that old, damaged down engine oil is replaced before it loses its chemical and also mechanical properties, for this reason maximizing protection versus wear. Organization intervals vary in between 12v, 24v, and 24v usual rail Cummins engines (see schedule below). Always follow the manufacturers said oil change interval and adhere to the alternative "severe duty" schedule if you fulfill 1 or much more of the requirements.

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5.9L Cummins Engine Oil

All 5.9L Cummins turbodiesels (6BT and also ISB) attribute a 12 quart oil capacity (with filter change) and also share the very same oil filter. Engine oil must be replaced per the oil adjust interval chart below using the ideal viscosity listed in the applicable graph below. Overfilling or underfilling the crankcase may result in oil aeration and compromised oil pressure. Always verify oil level on dipstick after running engine and permitting to cool for 15 minutes (oil in the height of the engine must drain earlier into the crankcase prior to checking oil fill level). No Cummins nor Chrysler recommend the usage of a supplemental oil additive in 5.9L diesel engines. A high quality, synthetic engine oil is encourage for every engines. Constantly fill the oil filter with roughly 1 quart the clean engine oil before installing, i m sorry will assist prevent dried starts and ensure oil push builds easily after transforming the oil.

5.9L Cummins Oil change Intervals

Severe organization conditions encompass towing, hauling, control in stop-and-go traffic, taking frequent quick trips, operation in warm weather, operation in exceptionally cold weather, and also frequent durations of extreme idling; always following the organization interval that applies to your operating conditions. Most vehicles will fall under the severe organization category, uneven your van is used for the sole purpose of commuting and also your course sees restricted city driving.

Model Years

Normal business Interval

Severe organization Interval

1989 - 1998 (6BT, 5.9L Cummins 12v)

6,000 miles/6 months

3,000 miles/3 months

1998.5 - 2002 (ISB, 5.9L Cummins 24v)

7,500 miles/6 months

3,750 miles

2003 - 2007 (ISB, 5.9L Cummins 24v)

15,000 miles/6 months

7,500 miles/6 months

5.9L Cummins Oil adjust Parts list

Fleetguard is Cummins" organization parts brand and is the recommended replacement oil filter for every Cummins turbodiesels; protect against cheap aftermarket filters. Change the engine oil pan drainpipe plug when the edges of the head start to show signs of wear or the gasket establishes a leak. Replace the oil to fill cap as soon as it starts to present signs of degradation to prevent particles/pieces from dislodging and falling into the crankcase.


Part Number

Engine oil filter

Fleetguard FL16035 (all 5.9L Cummins)

Oil pan drainpipe plug

1989 - 1993

MOPAR 4293859

1994 - 2002

MOPAR 4778578

2003 - 2007

MOPAR 05080631AB

Engine oil fill cap

1989 - 1998

Cummins 4962608

1998.5 - 2007

Cummins 3973511

1989 - 1998 5.9L Cummins Oil Viscosity chart (12 valve)

Ambient Temperature Range

Oil Viscosity

Greater 보다 10° F

SAE 15W-40

0 - 30° F (w/ out making use of engine block heater)

SAE 10W-30

Less 보다 0° F (must usage engine block heater)

SAE 10W-30

Less than 0° F (w/ out using engine block heater)

SAE 5W-30

1998.5 - 2002 5.9L Cummins ISB Oil Viscosity chart (24 valve)

Ambient Temperature Range

Oil Viscosity

Greater than 10° F

SAE 15W-40

0 come 30° F (w/ out using engine block heater)

SAE 10W-30

-10° F to 30° F (must usage engine block heater)

SAE 10W-30

-10 come 0° F (must usage engine block heater)

SAE 5W-30

2003 - 2007 5.9L Cummins ISB Oil Viscosity chart (24 valve, common rail)

Ambient Temperature Range

Oil Viscosity

Greater than 0° F

SAE 15W-40

All temperatures

SAE 5W-40 complete synthetic


Diesel Hub recommends the adhering to Amsoil commodities for Dodge lamb models equipped through the 5.9L Cummins turbodiesel:

Amsoil Max Duty Signature series 5W-40 diesel oil Premium cold weather oil for maximum engine protection

Amsoil man-made engine oils offer:

• superior protection against fuel dilution and also oil consumption

• exceptional resilience against thermal, mechanical, and chemical breakdown of engine oil

• boosted oil flow and engine security in sub-zero temperatures and during cold starts

Amsoil is a top manufacturer of synthetic oils and lubricants, consisting of a heat of engine oil engineered to fulfill the stringent demands particular to diesel engines.

Synthetic engine oil is superior in every way, shape, and type than conventional petroleum based engine oils. Fabricated motor oil attributes a significantly higher resistance to heat breakdown, chemical break down (contamination from fuel dilution and exhaust soot), and mechanical break down (shear). It is backwards compatible with ALL engines nevertheless of age and type.

5.9L Cummins Engine Oil adjust Procedures

Note: 1994-1998 version year Cummins 6BT featured in actions below

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• Park the vehicle, set the parking brake, and permit the engine come cool for ~ 1 hour before changing the motor oil.

• ar a an ideal drain pan (minimum 12 quart capacity) listed below the engine oil pan drainpipe plug.

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• remove the drainpipe plug and enable the oil to drain. As soon as the engine oil has drained completely, reinstall the drainpipe plug. Install drain plug snug; do not overtighten. If the drainpipe plug seal is jeopardized it need to be replaced.