Look pretty sweet! If you got rid of all the rear plastic, you could have used sheet metal to make some nice shelving or cabinetry, solving your oil storage problem

As far as MPG, folks, don't forget, they have real gas in Alaska, not this crappy blended stuff. My Expedition went from 10ish mpg to 12ish mpg when I hit (Wyoming I think) on my way to Moab. That ethanol garbage gets horrible mpg.