Methods for Rating the Viscosity-Temperature Behavior of Polymer-Containing Lubricants

Paper #:
  • 2015-01-2048

Published:
  • 2015-09-01
DOI:
  • 10.4271/2015-01-2048
Citation:
Zakarian, J., Webb, M., and Hunter, B., "Methods for Rating the Viscosity-Temperature Behavior of Polymer-Containing Lubricants," SAE Technical Paper 2015-01-2048, 2015, https://doi.org/10.4271/2015-01-2048.
Pages:
6
Abstract:
The Viscosity Index (VI, ASTM D2270) has a long and widespread history as a rating scale for the viscosity-temperature behavior of lubricants. However, the method has serious technical deficiencies which can lead to misleading conclusions. We have examined alternatives to the VI scale in an effort to more accurately characterize the viscometric behavior of modern lubricants, which are formulated with highly refined base oils and advanced polymers. We have found that the VI method can actually mask improved viscosity-temperature behavior for certain highly additized polymer-containing lubricants. We examine two different methods, the Roelands Slope Index and the Proportional VI, as an alternative to VI. It is important for lubricant developers and consumers to be aware of the limitations of the VI scale in describing the viscometric qualities of modern, high performance lubricants.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2010-04-12
Training / Education
2018-05-03
Technical Paper / Journal Article
2011-04-12
Training / Education
2018-05-10