0 farenheit and falling

at 10 am the thermometer on the dashboard read 5 F.  the car started right up (Subaru, of course!) and i backed it out of the shed into the sun.  
5 minutes later i came back and it now read 3.
isn't it amazing that it worked at all?  that the tires don't freeze in, that the doors open, etc?
driving through sun and shade the temperature remained steady between 0 and 1.
i had a car for awhile that had to have boiling water poured on something under the hood, i forget what now, for it to start when it was 0 or thereabouts. 
of course by the time i carried the kettle out to the driveway, it was not boiling, but it worked.
brrrr!