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Prediction of Viscosity Stability of Multigrade Engine Oils in Service
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English
Abstract
The viscosity change of multigrade motor oils in service has been evaluated in a fleet representative of the present European car population. The evaluation covered air- and water-cooled engines, with conventional and integral gearboxes, and displacements ranging from 500-1750 cc.
The effect of car, service, average ambient temperature, and type of polymer on the viscosity change of a lubricant has been estimated.
The multigrade test oils have also been run in injector and bench engine tests in order to compare field testing results with laboratory techniques being developed.
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Authors
Citation
Ingoni, A. and Vicenzetto, F., "Prediction of Viscosity Stability of Multigrade Engine Oils in Service," SAE Technical Paper 740974, 1974, https://doi.org/10.4271/740974.Also In
References
- Messina N. V. Radtke H. H. “Viscosity Stability of Polymer-Thickened Oils.” Paper 700053 SAE Automotive Engineering Congress January 1970
- Murphy C. K. Bennett P. A. “V.I. Improvers and Engine Performance.” SAE Transactions 77 1968 paper 680071
- Preuss A. F. Stambaugh R. L. Radtke H. H. “The Viscosity Stability of Multigraded Crankcase Oils.” Paper 680070 SAE Automotive Engineering Congress Detroit January 1968
- Bramhall A. D. Wright B. “Rig Tests to Predict Viscosity Losses of Multigrade Oils in Service.” Institute of Petroleum Symposium “Performance Testing of Lubricants for Automotive Engines and Transmissions.” Montreux, Switzerland 1973
- Smith, M. F. Jr. Stewart R. M. Stringer H. R. “Shear Stability of Multigrade Crankcase Oils in Cars, Laboratory Engine and Bench Tests.” Paper 720946 SAE Fuels and Lubricants Meeting Tulsa October 1972