This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Toward Improved Fuel Economy in Passenger Car Motor Oils: An Investigation into the Influence of Detergent System and Friction Modifier as Measured by the EPA Federal Test Procedure and Highway Fuel Economy Test Cycles
Annotation ability available
Sector:
Language:
English
Abstract
The 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 (ASTM Sequence VIA). The durability of this fuel economy improvement is becoming increasingly important and will be addressed in the successor to the Sequence VIA, the Sequence VIB, which proposed for ILSAC GF-3. Previous investigations have indicated that the choice of detergent system and friction modifier have a large impact on the fuel economy of a lubricant, and this study was designed to analyze these effects further. The work was carried out in three phases. In the first phase, seven detergent systems were evaluated and compared to currently available GF-2 lubricant in a vehicle equipped with a 4.6L SOHC V8 engine using a 500-mile Accelerated Mileage Accumulation (AMA) cycle. Fuel economy improvement was calculated against the ASTM Sequence VIA Baseline Calibration oil (BC-2) as a reference. In the second phase, a single detergent system was treated with four friction modifiers in a 4000-mile AMA accumulation with interim fuel economy testing at 500 miles to determine both initial fuel economy and durability of the systems. The final phase coupled the best detergent system/friction modifier and tested across five vehicle makes of differing engine displacement and valve train configuration to determine the general utility of the oil. In all three phases, fuel economy was measured using the EPA Federal Test Procedure and Highway Fuel Economy Test Cycles. The results of this investigation, including drain analyses, are discussed; and a comparison is presented of the three methods used in monitoring the fuel consumption: carbon balance, fuel flow metering, and gravimetric measurement.
Recommended Content
Authors
Citation
Wilk, M. and Newkirk, M., "Toward Improved Fuel Economy in Passenger Car Motor Oils: An Investigation into the Influence of Detergent System and Friction Modifier as Measured by the EPA Federal Test Procedure and Highway Fuel Economy Test Cycles," SAE Technical Paper 982505, 1998, https://doi.org/10.4271/982505.Also In
References
- Korcek S. “Engine Oils 2000,” Proc. 8th International Colloquium Technische Akademie Esslingen
- Chamberlin, W. B. “Looking Toward a New Dynamometer Test to Classify Energy Conserving Engine Oils,” NPRA Presentation 1985
- National Highway Traffic Safety Administration “Automotive Fuel Economy Program, Twenty-second Annual Report to Congress, Calendar Year 1997,” 1997
- Code of Federal Regulations B 1995
- JAMA AAMA “The ILSAC Minimum Performance Standard for Passenger Car Engine Oils,” 1990
- Kennedy, S. Moore, IL. D. “Additive Effects on Lubricant Fuel Economy,” SAE Paper No. 872121 , 1987
- Igarashi, J. Kagaya, M. Satoh, T. Nagashima, T. “High Viscosity Index Petrolium Base Stocks - The High Potential Base Stocks for Fuel Economy Automotive Lubricants,” SAE Paper No. 920659 1992
- Johnson, M. Jensen, R. Korcek, S. “Base Oil Effects on Friction Reducing Capabilities of Molybdenum Dialkyldithiocarbamate Containing Engine Oils,” SAE Paper No. 972860 1997
- Wilk, M. A. Abraham, W. D. Dohner, B. R. “An Investigation into the Effect of Zinc Dithiophosphate on ASTM Sequence VIA Fuel Economy,” SAE Paper No. 961914 1996
- Johnson, M. D. Jensen, R. K. Clausing, E. M. Schriewer, K. Korcek, S. “Effects of Aging on Frictional Properties of Fuel Efficient Engine Oils,” SAE Paper No. 952532 1995
- Johnson, M. Jensen, R. Korcek, S. “Additive Interactions and Depletion Processes in Fuel Efficient Engine Oils,” SAE Paper No. 971694 1997
- Arai, K. Yamada, M. Yoshizawa, S. Ohira, H. Hoshino, K. Ueda, F. Akiyama, K. “Lubricant Technology to Enhance the Durability of Low Friction Performance of Gasoline Engine Oils,” SAE Paper No. 952533 1995
- Supp, J. A. Wilk, M. A. Dohner, B. R. “An Investigation into the Effect of Viscosity Modifiers and Base Oils on ASTM Sequence VIA Fuel Economy,” SAE Paper No. 972925 1997
- Tseregounis, S. I. McMillan, M. L. “Engine Oil Effects on Fuel Economy in GM Vehicles - Comparison with the ASTM Sequence VIA Engine Dynamometer Test,” SAE Paper No. 952347
- Dohner, B. R. Wilk, M. A. “Formulating for ILSAC GF-2 - Part 2: Obtaining Fuel Economy Enhancement from a Motor Oil in a Modern Low Friction Engine,” SAE Paper No. 952343 1995