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The Measurement of the Viscosity Stability of Multigrade Engine Oils and Its Effect on Performance
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Sector:
Event:
National West Coast Meeting
Language:
English
Abstract
It is shown that the measurement of the viscosity stability of multigrade engine oils containing different VI improvers is dependent upon the shearing action of the test instrument. Mechanical rather than cavitational stresses must be used to obtain an accurate prediction of field performance. Car make as well as average engine speed influence the equilibrium viscosity of the used oil. The effect of shear stability on other performance characteristics of the multigrade oil are described in this paper.
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Authors
Topic
Citation
Crouse, W. and Wilkins, G., "The Measurement of the Viscosity Stability of Multigrade Engine Oils and Its Effect on Performance," SAE Technical Paper 700668, 1970, https://doi.org/10.4271/700668.Also In
References
- Glazier F. P. Sumner N. E. “The Changing Automotive Engine Oil Market.” 16th Meeting of the Automotive Industry and the Marketing Division API Detroit February 1970
- SAE Recommended Practice Crankcase Oil Viscosity Classification-J300a 1968 SAE Handbook
- LeMar R. Bootzin D. “Discrepancies between Mechanical and Sonic Shear Methods in Evaluating Shear Stability of Hydraulic Fluids.” ASTM Symposium on Polymer Degradation Atlantic City January 1964
- Vick G. K. Goodson R. M. “Viscosity Loss in Polymer-Thickened Oil During Use.” ASTM Symposium on Polymer Degradation Atlantic City January 1964
- LePera M. E. Pigliacampi J. “Development of a Laboratory Technique for Defining Mechanical Shear Stabilities of Multigrade Engine Oils.” CCL Report No. 273 U.S. Army Aberdeen Research and Development Center, Coating and Chemical Laboratory Aberdeen Proving Ground, Maryland November 1969
- Messina N. V. Radtke H. H. “Viscosity Stability of Polymer-Thickened Oils.” Paper 700053 SAE Automotive Engineering Congress Detroit January 1970
- Crouse W. W. Koelsch B. N. Preston W. D. “Measurement of Oil Economy in Passenger Car Engines.” Paper 680414 SAE Mid-Year Meeting Detroit May 1968
- Murphy C. K. Bennett P. A. “VI Improvers and Engine Performance.” Paper 680071 SAE Automotive Engineering Congress Detroit January 1968