I get 15 mpg right now accounting for odometer... On a good day. I wonder what gearing I have currently? Any way to check without pulling the third member? I have no idea what was done to the truck previously besides what showed up on Carfax.Yep, the extra gearing is great for towing. Just keep in mind that all the gains you get on the low end or when loaded are a tradeoff up top in gas mileage. My truck averages about 15mpg once you account for the different odometer reading.