This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Evaluation of API/ILSAC GF-4 Oil Life in Today's US Fleet
Technical Paper
2008-01-1740
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Engine technology in passenger vehicles continues to evolve to meet consumer needs, improve fuel efficiency and reduce emissions. Likewise, engine oil classifications and performance requirements have evolved to meet the demands of the latest engine technology. This paper explores the degradation of engine oil quality in service by monitoring the condition of the used oil samples obtained from real-world, non-fleet consumer applications. In a previous study (SAE 2003-01-1957), used oil analysis results were reported for API/ILSAC GF-2 engine oil samples to determine oil degradation trends during service life. These samples were collected from a variety of vehicles, representing different driving conditions and oil brands. Each sample was analyzed to monitor additive depletion, accumulation of contaminants, and change in the physical and chemical properties of the oils. This study is a continuation of the previous work and includes API/ILSAC GF-4 engine oil samples. The data indicates an improvement in the used oil condition from API/ILSAC GF-2 to API/ILSAC GF-4 oils. As indicated in certain vehicles' manuals, several factors including individual driving habits and local operating conditions can impact how motor oil performs and degrades in service. These findings indicate that although engine and engine oil technology continue to improve, it is not possible to predict oil's expected life in service at statistically significant levels under a variety of operating conditions and external variables based upon engine oil age (miles). There appear to be circumstances in the current passenger vehicle population that would necessitate engine oil changes at relatively short drain intervals.
Recommended Content
Authors
Citation
Rappaport, S., Ferner, M., Hecker, L., and Tierney, T., "Evaluation of API/ILSAC GF-4 Oil Life in Today's US Fleet," SAE Technical Paper 2008-01-1740, 2008, https://doi.org/10.4271/2008-01-1740.Also In
References
- R.L. Polk & Co.'s National Vehicle Population Profile® (NVPP®) Vehicle Registration Database
- Power Info Network
- SEMA eNews 10 8 February 21 2007
- The MOTOR Information Systems/Chek-Chart
- The Pennzoil-Quaker State Company/Harris Interactive Poll spring 2001 Harris Interactive surveyed 3,345 Americans online for CONE Inc. Boston, MA
- R. L. Polk & Co. NVPP® 7 1 06 R.L. Polk & Co.'s 2007 Viscosity Lifecyle Project
- Lacey, P.I. Gunsel, S. Ferner, M.D. Pozebanchuk, M. Alim, A. “Effect of Oil Drain Interval on Crankcase Lubricant Quality,” SAE Paper 2003-01-1957 2003
- Boose, E. R. Handbook of Lubrication: Theory and Practice of Tribology I CRC Press, Inc. Boca Raton, Florida 1986
- Mang, T. Dresel, W. Lubricants and Lubrication Wiley-VCH Weinheim, Germany 2001
- Heywood, J.B. Internal Combustion Engine Fundamentals McGraw-Hill Publishing Company New York, New York 1988
- Benchaita, M.T. Lockwood, F.E. “Reliable Model of Lubricant-Related Friction in Internal Combustion Engines,” Lubrication Science 5-4 259 280 July 1993
- Carley, L. “Ring of Fire, The Extreme Life of Piston Rings and the Technology Used in Their Development,” Tomorrow's Technician 18 26 Babcox 2007
- Schwartz, S. Smolenski, D. “Development of an Automatic Oil-Change Indicator System,” SAE Paper 870403 1987
- Tseregounis, S.I. McMillan, M.L. Olree, R.M. “Engine Oil Effects on Fuel Economy in GM Vehicles - Separation of Viscosity and Friction Modifier Effects,” SAE Paper 982502 1998
- Smolenski, D.J. Kabel, R.H. “Evaluation of Camshaft and Lifter Wear, Deposits, and Oil Thickening with Low-Phosphorus Engine Oils in Taxicab Service,” SAE Paper 861516 1986
- Marshall, E.R. “Use Oil Analysis - A Vital Part of Maintenance,” Lubrication 79 2 1 12 Texaco Inc. White Plains, New York 1993
- Dyroff, G.V. “Manual on Significance of Tests for Petroleum Products,” ASTM Series MNL1 Philadelphia, PA 1989