TBN Retention - Are We Missing the Point?

Paper #:
  • 972950

Published:
  • 1997-10-01
Citation:
van Dam, W., Broderick, D., Freerks, R., Small, V. et al., "TBN Retention - Are We Missing the Point?," SAE Technical Paper 972950, 1997, https://doi.org/10.4271/972950.
Pages:
8
Abstract:
Historically, the characterization of fresh and used diesel engine lubricants has been based on a limited number of analytical techniques. One of the most important analyses has always been the total base number (TBN) measurement. Although the TBN measurements are informative, easy, and quick, it can be misleading to base the judgment of an oil's performance solely on one criterion.This paper offers observations from a field test, showing that some detergent approaches gave unacceptable performance even though the TBNs were at an acceptable level. It is hypothesized that some detergents do not effectively neutralize all acidic species present in the lubricant, thereby reserving their own base while in fact the oil may no longer provide sufficient protection against bearing corrosion. This hypothesis is supported with bench and engine test data. It is recommended that, at a minimum, total acid number (TAN) measurements be included in any analysis. Where time and cost allow, wear metals content, oxidation, soot content, and viscosity should also be evaluated.
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
2010-10-25
Article
2017-03-13
Technical Paper / Journal Article
2010-10-25
Training / Education
2018-03-19
Technical Paper / Journal Article
2010-05-05