After running with full rear wheel skirts fer the past 6 months, I've removed the lower portion of the rear wheel skirts to git some numbers. I'm already missing the MPG numbers I've been gitting with them installed.
Made a run up and back to College Station in light traffic yesterday. MPGs going up with no load in the bed was an indicated 23.5mpg at 65mph. Coming back I got 24.2mpg at 65mph.