Yeah, for the sake of Pete People.....Have you all taken leave of your senses???
I mean, if you were to drive off a cliff and your windshield wipers were on, would you assume the flapping of the wipers was making you fall to the ground?
You lose a crap load of MPG's when the temperature drops for many reasons, heater load is a very small part of the cause. Check out this old thread for good stuff.
MetroMPG's list of reasons why your winter mileage is so bad
Heater indeed....no more talk of this!