This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Formulating for ILSAC GF-2 - Part 2: Obtaining Fuel Economy Enhancement from a Motor Oil in a Modern Low Friction Engine
Annotation ability available
Sector:
Language:
English
Abstract
The proposed International Lubricant Standardization and Approval Committee (ILSAC) GF-2 specification requires Passenger Car Motor Oils to provide enhanced fuel economy in a modern low friction engine (Sequence VIA). This paper details fundamental studies of lubricant effects on fuel economy as measured by this low friction engine. Several conventional friction modifiers were tested with surprising results. One ester friction modifier, Ester B, which provides excellent fuel economy improvement in the Sequence VI, was found to be detrimental to the Sequence VIA. A second ester friction modifier, Ester A, performed as expected. Additionally, two molybdenum compounds, which are reported to provide excellent fuel economy in the Sequence VI, showed no fuel economy benefit in the Sequence VIA. Subsequent measurement of fuel economy via the EPA FTP 75 test cycle, has shown the molybdenum compounds to enhance fuel economy and Ester B, the poor ester friction modifier (as measured by the Sequence VIA), to provide the largest fuel economy enhancement.
Recommended Content
Topic
Citation
Dohner, B. and Wilk, M., "Formulating for ILSAC GF-2 - Part 2: Obtaining Fuel Economy Enhancement from a Motor Oil in a Modern Low Friction Engine," SAE Technical Paper 952343, 1995, https://doi.org/10.4271/952343.Also In
References
- Korcek S. “Engine Oils 2000,” Proc. 8th International Colloquium 1992
- JAMA AAMA “The ILSAC Minimum Performance Standard for Passenger Car Engine Oils,” 1990
- Martin F. A. “Friction in Internal Combustion Engine Bearings,” Combustion Engines - Reduction of Friction and Wear, International Tribology Conference London 1985
- Lang O. R. January 29 1982
- Taylor C. F. The Internal Combustion Engine in Theory and Practice 1 2nd The MIT Press 1986 312 361
- Inoue K. Tominaga E. Akiyama K. Ashida T. “Effects of Lubricant Composition on Fuel Efficiency in Modern Engines,” SAE paper 951037 International Congress and Exposition Detroit, Michigan February 1995