Diesel is subject to foaming. It aerates real easy. If you corner me, I'd say it has do to with the vapor pressure of Diesel fuel. I need Frank to jump in here if he has anymore information. If I stumble across any information on the foaming of Diesel Fuel, I'll post it.
Well guys, I can't tell you why it is brown but, the #2 Diesel we use for the Emergency Diesel Generators at work is pedigreed fuel and every tanker is lab testing for purity, TDS, additives, etc. and that stuff will do the same thing. Stains brown too.
George may be able to shed some light on this. I'm sure it is a chemistry thing.
I'm going to guess it is the asphaltines dissolved in the Diesel. Hey George! Help me out here!
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