And for desperate person doing desperate things.
Should your diesel connot be fired during cold weather.
Folks here use a tiger torch ( a big propane burner) couple with a stove pipe, and blow hot air tot he bottom of the oil pan.
Being Diesels, u have no worries of gettign fires as a gas engine.
Or have a little propane cap stove heat up under oil pan or the rad.

Be sure u have fire extinguishers around when doing this high wire act!!!!

Diesels are much harder to light up. Caveat Emptor. DOn't sue me if u burn down your house though.

We did it with our propane Bobcat once, the port coleman heater was flameless. Stick it undere the oil sump.
The temp was few below not too cold.
Good Luck.