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Modified Reciprocating Viscometer Predicts High Temperature Cranking Properties of Engine Oils
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Abstract
A reciprocating viscometer which was used for determining cold-cranking properties of engine oils was modified so it could be used to predict low-speed, hot-cranking properties of crankcase oils in full-scale engines. Since the current 210 F ASTM D 445 viscosities of multigrade oils fail to predict their hot-cranking properties, there is need for such a unit. A high degree of correlation was obtained between the 210 F viscosities determined with the modified reciprocating viscometer and those determined using a full-scale test engine for a group of V.I. improved oils and a group of commercial premium multigrade crankcase oils. The correlation obtained between the two units for a group of 5W oils containing oiliness agents indicates the viscometer to be satisfactory for screening tests. In general, this viscometer can satisfactorily predict low-speed, hot-cranking properties of oils in full-scale engines quickly and economically.
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Citation
Stewart, R. and Spohn, C., "Modified Reciprocating Viscometer Predicts High Temperature Cranking Properties of Engine Oils," SAE Technical Paper 690769, 1969, https://doi.org/10.4271/690769.Also In
References
- Stewart R.M. Spohn C. R. Meyer W. A. P. “Some Factors Contributing to Winter Hot Starting Difficulties in Automotive Engines.” SAE Transactions 77 1969 1453 1465
- Stewart R. M. Spohn C. R. Meyer W.A.P. “Influence of Lubricating Oil Formulation on Winter Hot Starting Engine Torque Requirements.” Paper 690157 presented at SAE Automotive Engineering Congress Detroit January 1969
- Courtney R. L. “Some Effects of Crankcase Lubricant Viscosity on Engine Operation.” Paper 660541 presented at SAE West Coast Meeting Los Angeles August 1966
- Stewart R. M. Lion W. D. Meyer W.A.P. “A Reciprocating Viscometer for Predicting the Low Temperature Cranking Characteristics of Engine Oils.” SAE Transactions 74 1966 501 517
- Meyer W.A.P. Stewart R. M. “Development of an Improved Reciprocating Viscometer for Predicting the Low Temperature Cranking Characteristics of Engine Oils.” SAE Transactions” 77 1969 223 238
- American Society for Testing & Materials, ASTM Standards on Petroleum Products “Proposed Method of Test for Apparent Viscosity of Motor Oils at Low Temperature Using the Reciprocating Viscometer.,” Part 17 January 1969 1091 1100
- Dowson D. “Boundary Lubrication, An Appraisal of World Literature.” ASME New York 11 234 235