I'm quite enjoying the car because driving it doesn't feel like I'm in an underpowered gas saver, even if I am.
I'm not really
trying for high MPG numbers with the car yet. I've obviously been driving decently during the engine break in which I figured would get a MPG baseline set.
As for hypermiling, I've only been practicing driving without brakes and coupled with the habits from a decade of driving the slow diesel it replaced is giving me naturally good MPG numbers.
The tires are at max PSI, and I'll be leaving the car stock through the warranty then I might play with... err test some stuff. The only mods I've done yet was to remove the front license plate holder from the front bumper (damn the dealership for holes in the bumper) as well as all the rear badges, but those were for aesthetics rather than aerodynamics. The front plate did protrude about 3 inches so the removal might have given a (partial?) percent increase but I wouldn't expect it to be much.
I do plan on building a lightweight aerodynamic trailer to haul my scaffold & some tools for work in the future, which I hope will be similar to what BamZipPow has with a swivel wheel setup. I haven't done a ton of studying, planning, and figuring, but from what I have done, I feel confident that I will be able to follow the streamline template really closely, and the car+trailer combo will be no longer than the (extended cab longwheelbase) F250 was, with a much tighter turn radius.