I just got a reply to a question I asked Scott McKenzie of Houghton International. Scott verified my memory, that McMaster-Carr "11 second" quench oil is very, very much like Houghto-quench "G" / Houghto-quench 3430...
without saying that is exactly what it is.
My belief is, if I wanted Houghto-quench "G", I could buy McMaster-Carr's "11 second" quench oil and have it... that Scott is constrained from saying if it is or isn't...
http://www.mcmaster.com/#quenching-oil/=hupszy It looks like the 5 gallon quantity ships out of New Jersey... don't know where the 1 gallon amount ships from... person could ask.
And a person could holler at Houghton and get data sheets on "G" to work from... ask questions about any other stuff, etc.
Mike