2500 4x2 Pickup L6-359 5.9L DSL Turbo (1994)
Engine Oil: Application and ID
LUBRICATING OIL VISCOSITY RECOMMENDATIONS
Use a multi-graded* oil, with the viscosity grades shown below, in the Cummins Turbo Diesel Engine. The use of single grade lubricating oil is
not recommended.
NOTES:
* 20W20 Is not considered a multi-grade oil.
** The same oil change interval is to be followed for synthetic oil as for petroleum based oil. Also, synthetic oil must meet the same performance
specifications as petroleum oil.
LUBRICATING OIL, ARCTIC OPERATION
Where there are no provisions to keep the engine warm when it is operating in ambient temperatures consistently below 23°C [-10°F], use a
lubricating oil that meets the following requirements.
SAE 5W30 viscosity grade synthetic oils may be used provided they meet the minimum viscosity at 100°C [212°F].
Parameter Test Method ..... Specifications
Performance Quality ..... API Classification CC/CD
Viscosity ..... 10,000 mPa°s Maximum at -35°C [-31°F]
....................... 4.1mm2/s Minimum at 100°C [212°F]
Pour Point (ASTM D-97) ..... Minimum of 5°C [9°F] Below the Lowest Expected Ambient Temperature
Sulfated Ash Content (ASTM D-874) ..... Maximum of 1.85% by Weight Maximum
