During the time I was guarding the country, I spent some time at the Arctic
Test Board and the NWTC at Ft. Greely AK.  (Recently re-commissioned I
understand).  A test process involved "cold-soaking" at various low
temperatures.  Tok Junction, where we often met on "road trips" achieved
notariety by logging -72F actual.  In my non-cheechako opinion, after -30F
it doesn't seem "colder" you just get cold faster.  Gotta love them Vapor
Barrier Boots, Oil, Engine, Sub-zero and the Winter grade diesel that
doesn't precipitate parrafine when chilled.  I would drain the aircooled VW
motor oil each night, plug in the pan heater, tote the oil inside and in the
morning just warm it up and put it back in, trying to remember to unplug the
heater before heading off to harass the day.  An unlimited supply of
quickstart was available (ether based starting fluid) so getting on the road
with a POV was only a 30 minute job.

Pensioner (Qualified Winter Driver for M38A, M113, M117, M88, M89, M60A1,
M141, M37, 2.5T, 5T trucks and of course Squarebacks)