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ASTM Study of Fluidity of Automotive Gear Oils at Low Temperatures
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English
Abstract
This paper reviews the work of ASTM Research and Development Division VII during 1973-77 related to the low-temperature flow characteristics of automotive gear oils. Phase I showed that the Canadian channel point test was superior to the U.S.A. method in operability and discrimination between oils, although some modifications to the Canadian method were recommended. Phase II concerned establishing reference oils based on tests in cold full-scale axles, and using these reference oils to evaluate laboratory tests for determining and specifying cold fluidity of gear oils. Brookfield viscosity proved most suitable, with channel point and pour point being much less favorable.
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Citation
Hitchcox, H. and Powell, D., "ASTM Study of Fluidity of Automotive Gear Oils at Low Temperatures," SAE Technical Paper 780939, 1978, https://doi.org/10.4271/780939.Also In
References
- Osborne, R. E. “New Trends in Gear Lubricant Viscosity” NLGI Spokesman Sept. 1977
- Powell, D. L. “Flow Properties of Hypoid Gear Lubricants at Sub-Zero Temperatures” SAE Paper 720151 Jan. 10-14 1972
- SAE Standard J-306b
- Gyer, J. F. “Factors That Influence the Precision of Low Temperature Brookfield Viscosity Measurements” SAE Paper 780940 Nov. 13 1978