I hear you there. If you don't keep a fair amount of stupid pedal in the corners with the welded rearend they truck likes to jump and buck alot, so you have to keep some foot in it, and it doesn't help MPG. Personally I don't even try and measure anymore. I don't want to know, and try not to think about it. If I had to guess I would guess 6-8 intown, and 9-10 on highway. One reason for the poor numbers it the fact that I can't time my motor right now because I think my damper has slipped, and also moving up in elevation 4000ft. has caused the carb to run rich.