I was in Chicago winter of '76. Record cold that year, -58 iirc and I picked that day to change spark plugs in my 1967 polara 1 hour per plug, pull a plug, go in and warm up and do the next one
Was younger and dumber, car still wouldn't start, so bought a lil BBQ grill, broke the legs off it and built a good charcoal fire, slid it under oil pan and eureka we were up and running again
Outhouse at -40 and colder is just something everyone should experience