oil oxidation

[GMorg]

I found the linked article interesting. It graphically illustrates oxidation of various oils exposed to brass. Trimellitate esters were much more stable than PAOs. I understand why silica oils are not popular given that their combustion products include sand, but other than cost and the ozone, why aren't fluorocarbons found in engine oil?

Susanne Beyer-Faiss, Dr. Tillwich GmbH Werner Stehr, Horb, Germany, "Test Method for Simulating the Aging and Oxidation Stability of Lubricants". Practicing Oil Analysis Magazine. March 2005


http://www.practicingoilanalysis.com/article_detail.asp?articleid=716&relatedbookgroup=OilAnalysis

 

[bruce381]

solubility and additive compatability issues and probably not much improvement in any important areas.
bruce

 

[MolaKule]

quote:

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why aren't fluorocarbons found in engine oil?

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Don't know why they mentioned trimellitate esters; they are only good 2-cycle applications.


The article is referring to the peflurocarbon ether esters, a family of high temperature lubricating oils not compatible with any other oil. Being tested in Jet Engines and Diesel engines.


A very stable lubricating oil.

See:

http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic;f=56;t=000021

[ February 24, 2006, 06:14 PM: Message edited by: MolaKule ]