[Big Dave]

To answer some questions:

I haven't really done anything under the hood that helped much. A 203 degree stat did yield a 0.5 MPG improvement. A 4" exhaust didn't help at all. Using a Baldwin PA2818 air filter with all under hood intake didn't help a bit. Going from split-shot to single shot injectors did not improve MPG one iota.

I use all synthetic lubricants. Didn't improve MPG at all.

Gearing and aero are the big enchiladas if you want MPG from a pickup.

I don't see how my air dam is much different than the one on the race car.

BTW, my air dam is currently on the garage floor. It snows in Nap-town this time of year, and bulldozing snow is not conducive to high MPG.

I will probably trim it back a little this spring before I put it back on. One does get tired of the scraping.