It’s kinda weird, but I get 12.5 unloaded, and 11.5-12 towing. The worst mileage I got was 10.25, and that’s when I was hauling 22,000 pounds up several grades ranging 5-9%. I have 4:10, zf5, and 35 inch tires. Plus I’m running a turbo. It’s just interesting to me how little my mileage ever...