[Drive Stick]

I'd tape over the fog lights while you are at it, slick smooth the entire lower valance - headlights will be sufficient for light at night

Also, with your short trips and the engine probably never reaching operating temperate by the time you even reach your destination increasing mpg via aero mods may not has as much of an impact as you are hoping for.

Also on a 2.5 mile drive I suspect there aren't many chances for you to coast? I got my biggest gains from coasting. If I get my old job back its only 2 miles from me, I know my mileage will die hard once I am only driving 4 miles a day instead of 40. (the starting and stopping factor kills it)