Cool story.
Did they mention anywhere in the videos the oil grade?
In 2015 a couple of the full size jeep guys made videos illustrating super low temperature differences. Test 1: Three Synthetics vs a Conventional.
Amsoil Signature Series 5W-30, -51 C Pour point on data sheet
Mobil 1 High Milage 5W-30, -39 C Pour point on data sheet
Royal Purple 5W-30
Walmart Supertech 5W-30 (Conventional)
Test 2: two more synthetic 5W-30 and a 5W-40
Amsoil
Mobil 1
Castrol Edge 5W-30
Walmart Supertech 5W-30 (Synthetic)
Rotella T6 5W-40
Block heaters used to be common in New England. maybe still are.
Engine oil isnt the only oil to be concerned about at low temps. But thats another story...
The Walmart oil had a smaller pour throat. The other bottles had a larger mouth on the bottle. Maybe they should have pierced a small air hole in the bottom of the bottles.