We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Usenet Nutter saying something like:
Still very necessary in some parts of the world - like the Ice Road Truckers' territory. I was somewhat amused to see a large cut-out M for Mack, in the radiator shield. In those kind of temps, there is a very real probablity of the water freezing in the rad if the stat closes down a bit and restricts flow and even when working properly, if the engines on a light load the cold carries away so much heat the cores could freeze. In the recent temps in the British Isles, I would have put a blank over part of the rad on a longer journey.