Yeah Brett a block heater does wonders for the happiness of combustion engines in the cold, but you know that. What we would use in addition to that is oil pan heaters the pad kind that you silicone glue on, 25, 50, 75, 100 watt depending on the volume of the oil to be heated and the length of time to be preheated.
My Dodge diesel has a 750 watt block heater, 50 watt oil pan heater, ad a trickle charger, takes about 2 to 3 hours in colder temperatures. I keep 15-40 in it year around. In my big shop where my Kabota generator is, which can be un heated at times in the middle of winter I have a 25 watt pan heater on anytime that side is not heated. Also if it’s below zero inside there’s a 100K btu space heater setup to wash over it for 1/2 hour if needed, run by a Honda 2000.
Stuff likes warm oil, but you know that to.
We used to do winterizations on vehicles at my old shop and I remember one time it was -30 below probably colder and winterizations included changing differential fluid. Pulled the cover off a rear end after pushing in a frozen truck and the 90wt was formed up to the housing. 10 or 15 minutes later it had warmed enough to run completely into the catch pan. Took some Pennzoil 5-30 which was claimed to have a pour point of -35 below and placed in a jar at said temp and tried pouring, thick honey. The pour point means if you get some movement or slump in 5 minutes if the jar is laid on it’s side. Can’t imagine a cold engine pumping oils to the bearings.
Had a old mid 70’s Honda car, front wheel drive at -30 to -60 below would have to hit the rear hubs (sealed bearings) with a weed burner for a short time just so they would roll enough to allow the car to move.
But, I know I’m probably not telling you anything new, just remembering some of the miseries of cold weather. Get a sauna, can’t recommend them enough. Chases the chills away quite well.