On Sunday, 31 December 2017 11:13:32 UTC-4, Keyser Soze wrote:
Last scientific experiment of 2017:

Had to make an emergency grocery store run earlier this morning.
20F outside, turned on ignition of wife's Toyota in garage...38F on the
car's exterior thermometer...thank goodness!
Obviously, garage sucks up some heat through insulated house walls, for
which I am thankful because once started, the vehicles warm right up.

Helps too if the sun beams into any garage windows. Amazing what heat there still is in the sun..even this time of year.