TM 9-6115-668-13* with engine preheating onlyFigure 2-9 Viscosity Class (SAE C/ass).NOTE>Greater than<Less thanGreater than or equal toLess than or equal toIn addition to the possibilities listed in paragraph 2.3.3.1 and 2.3.3.2, it is recommended that SAE15W-40 (item 1, appendix E) be used when average ambient temperatures are 32 °F ( 0 °C), andSAE 5W-30 (item 2, appendix E) when average temperatures are 32 °F ( 0 °C).2.3.3.3 Oil Change Intervals.Since oil deterioration depends on operating conditions, fuel quality, and oil quality, oil change intervalscan vary. Table 2-6 indicates oil change intervals in operating hours (OH). Factors affecting these intervalsinclude:l Oil qualitylSulfur content of the diesel fuellOutside temperature (daily average)NOTEUse HOURMETER to determine operating hours.2 - 4 2
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