I've still somehow managed to maintain ~40 mpg even in the recent cold weather. Some of my morning commutes don't quite make it to 40 lately but still most days it works out, and evening commute still consistently makes it. But yeah, I'm on the side of not warming up because it's wasteful. Yes scraping sucks, but as for having a nice warm car... my usual thought is if I'm warm enough to be going around outside (jacket/gloves/whatever) then I'm guaranteed to be warm enough in the car where there's no wind chill. I pretty much only ever turn on the heat to help defog (which is becoming more necessary lately), and only as long as it takes to clear the windshield. On occasion I do warm it up some but mostly just deal.

But still waiting for the big FE hit. Dreaming that my increased knowledge and change in driving patterns since last winter might save me a bunch (last winter in mid-Feb when it got _really_ cold, I did in fact drop down under 30 mpg for a tank) this year.