[SEL] Oil Question

[Dave Rotigel]

Hi Jim,
         I once asked the same question to an old oil man, John Fankhauser. 
Knowing that I was totally ignorant of chemistry (unlike Twin) he was clear 
and succinct in his answer. He simply said "It's magic!"
         Dave
PS, Hope this helps!

At 07:30 PM 6/18/2007, you wrote:
>I was recently at a show next to a hot air engine with lots of 
>linkage.  The owner and I got to talking and we wound up with a oil question.
>when the linkage is oiled it later weeps out black even though their is no 
>combustion nearby and it is in a clean location.  The things that were 
>lubed were a steel pin through a brass link. Why does the oil turn black 
>when dirt does not appear to be a factor?
>Jim and Diane Kirkes