HOW-TO SECTION NOTICE: Monograde oils should not be used in MBE 900 engines, regardless of API service classification. Monograde oils gel at lower ambient temperatures, reducing lubricant flow, and they do not provide adequate lubricity at higher engine operating temperatures. These factors can result in severe engine damage. Figure 32 Engine Oil Temperature Ranges Synthetic Oils The oils must be API CJ-4 that have demonstrated field performance in Detroit Diesel engines. These oils must possess a High Temperature/High Shear (HT/HS) viscosity of 3.7 minimum.
For further information, refer to publication Engine Requirements – Lubricating Oil, Fuel and Filters , 7SE270, available from authorized Detroit Diesel distributors. Synthetic oils may be used in Detroit Diesel engines, provided they are API licensed and meet the performance and chemical requirements of non-synthetic oils outlined in this publication. Synthetic oils offer improved low-temperature flow properties and high-temperature oxidation resistance. However, they are generally more costly than non-synthetic oils. Select the SAE class (viscosity) on the basis of the average air temperature for the season see Figure 32 Product information about synthetic oils should be reviewed carefully.
Performance additive systems often respond differently in synthetic oils. NOTE: The use of synthetic oils does not permit extension of recommended oil drain intervals. 88 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION