diphenylamine use in engine oil ?

[vxcalais]

Does anyone know what purpose it serves in Engine oil ?

 

[CATERHAM]

You might have to PM MolaKule if you really want an answer on BITOG

 

[StevieC]

Originally Posted By: CATERHAM
You might have to PM MolaKule if you really want an answer on BITOG
+1

I don't know what that is...

 

[dparm]

After some quick Googling...

Alkylated diphenylamines are well-known anti-oxidants such as for use as additive components in lubricating oil compositions (or lubricants) for lubricating the crankcase of spark-ignited or compression-ignited internal combustion engines.

comprises a method of reducing oxidation in an internal combustion engine

provide the lubricant with sludge-inhibiting and/or varnish-inhibiting properties in operation of the lubricant in an internal combustion engine.



Cliff's Notes: sludge prevention.

Source:
http://www.faqs.org/patents/app/20080312472

 

[Boomer]

If it is really in there, it would be a good cleaning agent and possibly used as an antioxidant. Materials like this could easily help to pull atomic levels of metal (like iron) from surfaces. May account for higher iron levels in used oil analysis for some oils.

 

[Pablo]

You guys must have read my posts where I mentioned amines?

Ashless TBN boosters, cleaners, detergents, etc.

 

[znode]

Anilines are pretty standard antioxidants used throughout a pretty wide range of the industry, for rubber, plastics, etc. In oil it's a corrosion inhibitor. Let's just say that it does half the job of ZDDP (the other half being antiwear).

Originally Posted By: Boomer
May account for higher iron levels in used oil analysis for some oils.

...say what?

 

[Pablo]

True enough, organic amines can chelate metals.

 

[Tom NJ]

Originally Posted By: vxcalais
Does anyone know what purpose it serves in Engine oil ?


Diphenylamine is an anti-oxidant. It is relatively volatile and used in small dosages, usually
Tom NJ