On the aerocivic, turning on the headlights knocks the mileage down by 2 to 3 mpg. On the F150, lights on or off has no noticable effect on mileage.
On the aerocivic at any speed over 30mph, windows closed/fan on nets better mileage than windows open/fan off. On the F150, the mileage effects of windows open/closed or fan on/off is unnoticeable above the high levels of background drag.
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