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The Establishment of Laboratory Test Method for Gelation of Engine Oil Containing Magnesium Detergents
Technical Paper
2001-01-1986
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
It has been reported that engine oils containing magnesium detergents gel under special conditions. The authors have previously reported on the mechanism by which magnesium detergents form needle crystals, which is the main cause of the gelation[1]. For this article, the authors conducted tests in actual vehicles using several types of engine oils containing magnesium detergents, including oils for which gelation problems have been reported in the market. The gelation was reproduced, and the test oils were ranked by their propensity to gel. In addition, a laboratory test method was used in which water and CO2 were mixed into engine oil under controlled conditions, then left stored in a bottle for twenty days, after which the kinematic viscosity and the quantity of insolubles of the mixture were measured. The study demonstrated the correlation between the laboratory test method and the actual vehicle tests. The test method makes it possible to clarify the evaluation standards which can be applied to the existing magnesium detergents to prevent engine oil gelation problems.
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Citation
Naitoh, Y., Naganuma, N., Akiyama, K., and Sagami, H., "The Establishment of Laboratory Test Method for Gelation of Engine Oil Containing Magnesium Detergents," SAE Technical Paper 2001-01-1986, 2001, https://doi.org/10.4271/2001-01-1986.Also In
References
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- Minamitani H. Hirose Y. Matsudaira Y. Kumakura A. Kanai S. A Study on Needle Crystal Formation in Engine Oils Containing a Magnesium-Based Detergent SAE Paper 881588 1988
- Haruna J. Itoh N. Kosemura T. Roby S.H. Kocan P.W. Kahn J. Needle-Like Crystal Formation From Mg-Sulfonate Containing Oils Society of Automotive Engineers of Japan, Inc. JSAE Fall Convention Proceedings 956 1995-9 65
- Kumakura A. Suzuki K. An Evaluation Test Method for Needle Crystal Sludge Occurring in Oils Combined with Magnesium Detergents Japan Petroleum Institute Proceedings of 1997 Products Meeting 57
- Engine Oil Filterability Test(EOFT) General Motors Engineering Standard May 1980
- 1998 Asian, Japanese, European and North American Engine Oil Database, Institute of Materials
- Standard Test Method for Insolubles In Used Oils ASTM Annual Book of Standards, Section 5, Petroleum Products and Lubricants ASTM 1999
- Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids ASTM Annual Book of Standards, Section 5, Petroleum Products and Lubricants ASTM 1999