Friction and Wear Reduction Mechanism of Polyalkylene Glycol-Based Engine Oils
- Ford Motor Company, Dearborn, MI, USA
- Dow Chemical Company, Midland, MI, USA
- Argonne National Laboratory, Argonne, IL, USA
Polyalkylene glycols (PAG) have been explored as a possible base stock for engine oil formulation. The friction, wear, and load-carrying capacity of five different PAG chemistries were evaluated either as a base stock or as formulated oils in pure sliding and sliding-rolling conditions using various laboratory bench test rigs operating under boundary and mixed lubrication regimes. The results were compared against GF-5 SAE 5W-20 and a mineral-based oil. The wear surfaces were also characterized using various surface-sensitive techniques for analysis of tribofilms to understand the mechanism of friction reduction. The results indicated that PAG oils show lower friction/traction coefficients and improved load-carrying capability, depending on the formulation, than those of the GF-5 SAE 5W-20 and mineral-based oil. The adsorption of PAG molecules on the surface appeared to be responsible for the lower friction characteristics.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1481205
- Journal Information:
- Tribology Transactions, Vol. 61, Issue 4; ISSN 1040-2004
- Publisher:
- Taylor & Francis
- Country of Publication:
- United States
- Language:
- English
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