Sooted Diesel Engine Oil Pumpability Studies as the Basis of a New Heavy Duty Diesel Engine Oil Performance Specification 2002-01-1671
Changing diesel engine emission requirements for 2002 have led many diesel engine manufacturers to incorporate cooled Exhaust Gas Recirculation, EGR, as a means of reducing NOx. This has resulted in higher levels of soot being present in used oils.
This paper builds on earlier work with fresh oils and describes a study of the effect of highly sooted oils on the low temperature pumpability in diesel engines. Four experimental diesel engine oils, of varying MRV TP-1 viscosities, were run in a Mack T-8 engine to obtain a soot level ranging between 6.1 and 6.6%. These sooted oils were then run in a Cummins M11 engine installed in a low temperature cell. Times to lubricate critical engine components were measured at temperatures ranging between -10 °C and -25 °C.
A clear correlation was established between the MRV TP-1 viscosity of a sooted oil and the time needed to lubricate critical engine components at a given test temperature.
The results of this study were used to propose meaningful limits on sooted oil pumpability for PC-9 (API CI-4) and OEM specifications.
Citation: Stehouwer, D., Shank, G., Herzog, S., Hyndman, C. et al., "Sooted Diesel Engine Oil Pumpability Studies as the Basis of a New Heavy Duty Diesel Engine Oil Performance Specification," SAE Technical Paper 2002-01-1671, 2002, https://doi.org/10.4271/2002-01-1671. Download Citation
David M. Stehouwer, Greg Shank, Steven N. Herzog, Charles W. Hyndman, Bernard G. Kinker, Robert P. Simko
Cummins Inc., Mack Trucks, Inc., RohMax USA, Inc.
Spring Fuels & Lubricants Meeting & Exhibition
Lubricant Systems, Passenger Car, and Heavy Duty Engine Lubricants-SP-1710, SAE 2002 Transactions Journal of Fuels and Lubricants-V111-4