Engine block heater installed !

[i-DSi]

Hi Ben,
What 'noticable' difference are you expecting to see?
At -14?C, car parked outside, it would be great if your engine coolant temp rose to 35?C. And let's be honest, that's the same as a pure cold start in summertime, around noon on a hot day.
I did some measurements in the meantime. At -6?C, parked outside, I get 48?C. But: a few seconds after starting that drops to 38?C...because of pumping the warm coolant in the heater and the icecold oil is pumped in the warm engine. So the only difference that you might notice is a bit lower idle rpm and a not icecold airstream from your heater.
But your engine will be very happy with the heater, that's for sure. And don't you get warm air or a warmer engine faster? I mean: already after a few miles?

Edit: 2 hours plugged in should always be enough. I tested it and it levels out after 2 hours.