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Pumpability of Multigrade Engine Oils at Low Temperature
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English
Abstract
The low-temperature pumpability performance of multigrade engine oils was evaluated in several United States and European engines. Test oils included both experimental formulations and commercial service station oils; test temperatures ranged between -20 and 0 F.
The time for oil to reach engine rocker arms after startup at -15 F and -20 F was not related to low-temperature lubricant properties such as pour point and Brookfield viscosity. Pumpability (that is, oil gallery pressurization rate) of the oils improved markedly in successive cold-temperature starts, probably because of fuel dilution and shearing of microstructures in the oil. Engine design features can significantly affect pumpability performance.
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Citation
Smith,, M. and Graham, J., "Pumpability of Multigrade Engine Oils at Low Temperature," SAE Technical Paper 710139, 1971, https://doi.org/10.4271/710139.Also In
References
- Moyer R. G. “Low Temperature Pumpability of Oils.” Jrl. Am. Soc. Lub. Eng. April 1962 165 168
- Selby T. W. “Viscosity and the Cranking Resistance of Engines at Low Temperatures.” Proc. 6th World Petroleum Congress 241 258 Frankford June 1963
- Giavarini C. Pochetti F. Savu C. Rev. Combust. 23 9 September 1969 448 453