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Advances in Tribology
Volume 2017, Article ID 1257607, 12 pages
Research Article

Correlation Study of Physicochemical, Rheological, and Tribological Parameters of Engine Oils

1Department of Physics, Army Cadet College, Indian Military Academy, Dehradun 248007, India
2Uttarakhand Technical University, Sudhowala, Dehradun 248007, India
3Tribology and Combustion Division, CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, India

Correspondence should be addressed to Prashant Thapliyal; moc.liamg@401791.tnahsarp

Received 4 March 2017; Accepted 9 May 2017; Published 8 June 2017

Academic Editor: Meng Hua

Copyright © 2017 Prashant Thapliyal and G. D. Thakre. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The physicochemical and tribological studies of mineral and synthetic commercial engine oils have been carried out to investigate their performance variability and to propose generalized relationship among different physicochemical and performance parameters. Physicochemical parameters have been determined using standard test procedures proposed in ASTM and Indian Standards (BIS). The rheological parameters of these lubricants have been investigated to identify the flow behavior. The tribological performance in terms of their antifriction and antiwear properties has been studied using four-ball tribotester. Correlation and regression analysis has been performed to ascertain relationship among physicochemical and tribological parameters and the causes of performance variability are highlighted. An empirical relation to calculate coefficient of friction as a function of physicochemical properties has been established using regression analysis. The developed relation has fair degree of reliability, as percentage of deviation is less than 20%.