Well it does make perfect sense... Just fool the motor into thinking that it's a bunch colder outside, and it'll richen up the mix. I've noticed that every year with my truck; 18.5 mpg in the Summer, and 16.5 in the Winter... (NOT that I ever took the time to epxeriment with what that extra fuel was doing to the horsepoiwer that was available!

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2010 Blue RT Audio & Convenience model Se-5 transmision. Dealer-added foglights, accent LEDs and extra speakers. Some RTS chrome windshield, front spoiler and top trunk trim, RTS frunklight and frunk liner, Top Trunk liner, Chrome lower air deflector, fendertip LED bulbs and ISCI floorboards added by yours truly...