TRUCK SERVICE MANUAL
LUBRICATION
ENGINE (Continued)
DESCRIPTION
LUBRICANT
Crankcase (Continued)
Cummins
Operating Temperatures Vs. Viscosity
Ambient Temperatures
Viscosity
-23 C (-10 F) and Below
See Table A
-23 to -1 C (-10 to 30 F)
10W
-7 to 16C (20 to 60 F)
20-20W
4 C (40 F) and Above
30
Table A - Arctic Oil Recommendations
Parameter (Test Method)
Specifications
Performance Quality Level
API Class CC/SC or API Class CC/CD
10,000 Centistokes Maximum @ -34 C (-300 F)
Viscosity
5.75 Centistokes Minimum @ 99 C (2100 F)
At least -12 C (10 F) below lowest expected ambient temperature.
Pour Point (ASTM D-97)
Ash, Sulfated (ASTM D-874)
1.85% by Weight Maximum
IMPORTANT: Due to extreme operating conditions, oil change intervals
should be carefully evaluated paying particular attention to viscosity
changes and total base number decrease. Oil designed to meet MIL-L-
10295-A, which is now void, and SAE 5W mineral oils should not be
used.
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