This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Oxidation and Antiwear Retention Capability of Low-Phosphorus Engine oils
Technical Paper
2005-01-3822
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Future vehicle emission regulations both in the US and Europe will require maintaining catalyst efficiency for longer mileage intervals. In order to achieve this requirement, chemical restrictions are being placed on elements in engine oil that can poison catalysts. Most of phosphorus and a significant amount of sulfur in current engine oils come from zinc dialkyldithiophosphates, ZDDPs, which are a class of cost-effective multifunctional additives providing wear, oxidation and corrosion protection. Reducing ZDDP concentrations raises oxidation and wear concerns. The overall purpose of this research is to look at the antioxidation and antiwear capability of low phosphorus engine oils containing 0.05 wt% phosphorus and the potential of engine oils formulated without phosphorus. In addition to fresh oils, used oils drained from fleet vehicles were also analyzed and evaluated. The results indicate that by appropriately selecting and balancing supplemental phosphorus-free antioxidation and antiwear additives the antioxidation capability can be improved for low phosphorus and even non-phosphorus oils, and the antiwear performance of low phosphorus oils could be maintained or even improved.
Recommended Content
Authors
Topic
Citation
Gao, H., Bjornen, K., Gangopadhyay, A., and Jensen, R., "Oxidation and Antiwear Retention Capability of Low-Phosphorus Engine oils," SAE Technical Paper 2005-01-3822, 2005, https://doi.org/10.4271/2005-01-3822.Also In
References
- Johnson M. D. McCabe R. W. Hubbard C. P. Riley M. J. Kirby C. W. Ball D. J. Tripp G. McDonnell T. F. Lam W. Y. “Effects of Engine Oil Formulation Variables on Exhaust Emissions in Taxi Fleet Service” SAE Technical Paper 2002-01-2680
- Willermet P. A. Dailey D. P. Carter R. O. III Schmits P. J. Zhu W. “Mechanism of Formation of Antiwear Films from Zinc Dialkyldithiophosphates” Tribology International 28 3 1995 177 187
- Taylor L. Spikes H. Camenzind H. “Film-Forming Properties of Zinc-Based and Ashless Antiwear Additives” SAE Technical Paper 2000-01-2030 2000
- Fuller M. L. S. Fernandez L. R. Massoumi G. R. Lennard W. N. Kasrai M. “The Use of X-Ray Absorption Spectroscopy for Monitoring the Thickness of Antiwear Films from ZDDP” Tribology Letters 8 2000 187 192
- 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 Technical Paper, 861516 1986
- Shiomi M. Mitsui J. Akiyama K. Tasaka K. Nakada M. Ohira H. “Formulation Technology for Low Phosphorus Gasoline Engine Oils” SAE Technical Paper 922301 1992
- Culley S. A. McDonnell T. F. “The Impact of Passenger Car Motor Oil Phosphorus Levels on Engine Durability, Oil Degradation, and Exhaust Emissions in a Field Trial” SAE Technical Paper 952344 1995
- Gao H. Gangopadhyay A. K. McQueen J. S. Black E. D. Jensen R. K. Bjornen K. K. Soltis E. A. “Antiwear Performance of Low Phosphorus Engine Oils on Tappet Insert in Motored Sliding Valvetrain Test” SAE Technical Paper 2003-01-3119
- Johnson M. D. Korcek S. Jensen R. K. Gangopadhyay A. K. Soltis E. A. “Laboratory Assessment of the Oxidation and Wear Performance Capabilities of Low Phosphorus Engine Oils” SAE Technical Paper 2001-01-3541 2001
- Du D. Kim S. Chun J. Suh C. Kwon W. “Antioxidation Synergism Between ZnDTC and ZnDDP in Mineral Oil” Tribology Letters 13 1 2002 21 27
- Vipper A. B. Zadko I. I. Ermolaev M. V. Oleinik J. Y. “Engine Oil Aging under Laboratory Conditions” Lubrication Science 14 3 2002 363 375
- Yamaguchi E. S. Roby S. H. Yeh S. W. “Time-Dependent Film Formation from ZnDTPs and Nonphosphorus Antiwear Agents” Tribology Transactions 48 2005 57 68
- Jensen R. K. Korcek S. Johnson M. D. “Assessment of Useful Life of Current Long Drain and Future Low Phosphorus Engine Oils,” Additives 2001 Symposium Oxford, UK March 20-22 2001