* with engine preheating only
Figure 2-9 Viscosity Class (SAE C/ass).
Greater than or equal to
Less than or equal to
In addition to the possibilities listed in paragraph 126.96.36.199 and 188.8.131.52, it is recommended that SAE
15W-40 (item 1, appendix E) be used when average ambient temperatures are 32 °F ( 0 °C), and
SAE 5W-30 (item 2, appendix E) when average temperatures are 32 °F ( 0 °C).
184.108.40.206 Oil Change Intervals.
Since oil deterioration depends on operating conditions, fuel quality, and oil quality, oil change intervals
can vary. Table 2-6 indicates oil change intervals in operating hours (OH). Factors affecting these intervals
l Oil quality
Sulfur content of the diesel fuel
Outside temperature (daily average)
Use HOURMETER to determine operating hours.
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