[cas3]

re-refined oil...sorry for the drift, but in my youth i worked at warden oil in mpls. we took in drain oil, and ran it thru a long "press" they called it. it was, about 15 feet long, made up of 1 inch thick 4'x4' steel frames with canvas covers. they would mix some kinda clay in with the oil, mix and heat it up and pump it thru the press. about once an hour we would slide all the frames apart and scrape off the gook from the canvas and go again. the oil that came out was golden yellow like new. not sure what they did with the gook, and needless to say the epa shut it down in the 80's. all the holiday stations around the midwest sold it as the "house' brand