The gas mileage on mine (not broken in yet) is 17 mi/gal. It will get better but we don't buy these big bores for mileage anyway. When you ride it the gas mileage issue will be just a glimmer. We don't do much mud riding here but the Hurley video posted on here showed the PXT's in the 'hole and they did ok. I'm sure there are better--hey it's only money.