Cars - Why it's good to "idle" your car on cold mornings

http://jalopnik.com/yes-warm-your-damn-car-up-if-its-cold-1678251730


http://www.theglobeandmail.com/globe-drive/culture/commuting/help-im-moving-to-winnipeg-when-do-i-plug-in-my-car/article4791898/

http://www.autos.ca/forum/index.php?topic=41422.0