So I was browsing around in a new farm/tractor store yesterday to see what
their inventory was like, and I saw some vaccum pump oil for milking
machines for about $6 for a gallon.
I dunno about the suitability of the specific product I saw, but it was
labeled as high quality, anti-foaming, and a few other characteristics which
I don't know what kinds of pumps are used on milking machines, but this
might be a low cost alternative product, compared to the high cost of other
18 years ago