This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of Diesel Engine Lubricants by Micro-Oxidation
Annotation ability available
Sector:
Language:
English
Abstract
The micro-oxidation test, originally developed at Penn State, has previously been used to study the deposit forming tendency of diesel engine lubricants both at Penn State and Caterpillar using deposit levels and aggregate production of sludge precursor high molecular weight polymers to compare the oils. Researchers at General Motors have used the micro-oxidation test to study the kinetics of the oxidation induced deposit forming reactions for certain basestocks and partially formulated lubricants. In this paper, we begin with reporting the procedural refinement of the micro-oxidation test. We then illustrate how we have developed a method based on first order kinetics deposit forming reactions to rank the relative deposit forming tendency of lubricants. We show how the Arrhenius relationship can be applied to the oxidation reactions of fully formulated lubricants at temperatures consistent with those encountered in the piston ring belt area and top land of heavy-duty diesel engines. We then present the correlation we have achieved between the micro-oxidation results and full-scale engine tests for CD, marine, and railroad oils. We conclude with a discussion on the potential for the development of the micro-oxidation test to achieve correlation with other full-scale engine tests and the inherent benefits.
Recommended Content
Authors
Citation
Zerla, F. and Moore, R., "Evaluation of Diesel Engine Lubricants by Micro-Oxidation," SAE Technical Paper 890239, 1989, https://doi.org/10.4271/890239.Also In
References
- Perez J.M. Kelley F.A. Klaus E.E. Bagrodia V. “Development and Use of the PSU Microoxidation Test for Diesel Engine Oils” SAE Paper No. 872028 November 1987
- Klaus E. Krishnamachar V. Dang H. “Evaluation of Base Stock and Formulated Lubes Using the Penn State Microoxidation Test” Proceedings of the Conference on Measurements and Standards for Recycled Oil NBS Special Publication 584 285 94 1980
- Cho L.F. Klaus E.E. “Microoxidation Evaluation of Automotive Crankcase Oils” SAE Sp. Pub. 558 1 23 1983
- Klaus E.E. Cho L. Dang H. “Adaptation of the Penn State Microoxidation Test for the Evaluation of Automotive Lubricants” (SAE Paper No. 801362 ) SAE Sp. Pub. 80-473 83 92 1980
- Lahijani J. Lockwood F.E. Klaus E.E. “The Influence of Metals on Sludge Formation” ASLE Trans. 25 1 25 32 1982
- Klaus E.E. Shah P. Krishnamachar V. “Development and Use of the Microoxidation Test with Crankcase Oils” Proceedings of the Conference on Measurements and Standards for Recycled Oil The National Bureau of Standards September 1982
- Cvitovic E. Klaus E.E. Lockwood F. “A Thin-Film Test for Measurement of the Oxidation and Evaporation of Ester-Type Lubricants” ASLE Trans. 22 395 1979
- Tseregounis Spyros I. Spearot James A. Kite Deborah J. “Formation of Deposits from Thin Films of Mineral Oil Base Stocks on Cast Iron” Ind. Eng. Chem. Res. 26 886 94 1987