Originally Posted by NPT90
seems excessive since you are already warming the block via the coolant.
Though to be fair I have only lived as far north as Maine, so my opinion is certainly biased
Possibly excessive, but I found that even with a warm block, at -40C (aka -40F) the engine still struggles to turn over with the cold oil (even with full synthetic). The other point is that I leave the oil pan heater, battery heater, and cabin heater connected all the time (via a thermostat that turns on at around 0C) - so the Defender should never get fully cold which speeds up the warm up time significantly.
Plus it was project... and I was running short on things to do!