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Viscosity and Flow Properties of Multigrade Engine Oils-A Review of an International Colloquium
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Abstract
More than 250 participants from 18 countries attended this meeting offering a total of 24 papers presented by speakers from 11 countries.
The program of the colloquium provided an almost complete review of the present state of technology in the field of multigrade engine oils and their development. Besides the requirements of engines for specific engine oils and the fundamentals of rheology, the following main subjects were discussed:
Viscosity classification of engine oils development in the USA and in Europe; Chemical and physical properties of viscosity index improvers; Cold flow behavior and high temperature viscosity of VI-improver containing oils; Influence of mechanical, thermal, and oxidative stresses; Engine performance of multigrade engine oils; Startability and pumpability of engine, oils.
Some of the more important results and conclusions related to the subject of the relationship of engine oil viscosity to engine performance are reported and discussed.
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Bartz, W., "Viscosity and Flow Properties of Multigrade Engine Oils-A Review of an International Colloquium," SAE Technical Paper 780979, 1978, https://doi.org/10.4271/780979.Also In
References
- Bartz, W. J. “Viscosity and Flow Property of Multigrade Engine Oils.”
- Gairing, M. “Requirements of Internal Combustion Engines to Viscosity and Flow Properties of Engine Oils.”
- Kirschke, K. “Rheological Aspects.”
- Rumpf, K. K. “Viscometric Problems Involved in Engine Oils.”
- Müller, H. G. “Chemical Constitution and Mechanism of Performance of VI Improvers.”
- Du Parquet, J. “The Influence of the Nature of the Base Oil on Shear Stability of Polymer Thickened Oils.”
- Hubmann, A. “Structure of Base Oils and Properties of the Multigrade Engine Oils.”
- Gerbaz, G. P. “Laboratory tests on Viscosity Index Improvers.”
- Eckert, R. J. A. “The Behavior of Macropolymers in Solution Regarding Their Application as VI Improvers in Lubricating Oils.”
- Nemes, N. “Flow Properties of Polymer Solutions at High Temperatures.”
- Bartz, W. J. “Behavior of Non-Newtonian Lubricating Oils in Non-Steady Journal Bearings.”
- Von Petery, C. “Influence of Viscosity of Polymer-Thickened Engine Oils on the Cold Startability of Engine.”
- Langheim, R. “Behavior of Non-Newtonian Lubricating Oils in Non-steady Journal Bearings.”
- Hovemann, F. “New Findings Regarding Application of Hydrocarbon Viscosity Controllers in Multigrade Oil.”
- Neudorfl, P. “Polymethacrylates as VI Improvers for Multigrade Engine Oils.”
- Nater, P. “Performance and Properties of SAE 10W-40 Engine Oils Containing Polymethacrylates and Styrene-Isoprene-copolymers as VI Improvers.”
- Jenkinson, G. G. Marsden K. “Field Performance of Multigrade Premium Diesel Oils.”
- Vaerman, J. “Composition Effects on Multigrade Diesel Engine Oils Performance.”
- Denis, J. “Comparative Performances of Different Classes of VI Improvers - Laboratory and Engine Studies.”
- Bell, J. C. “Some Relationships Between the Viscometric Properties of Motor Oils and Performance in European Engines.”
- Stambaugh, R. L. “Contribution of VI Improver to Wear Control by Multigrade Engine Oils.”