I just bought mine in December and I wanted to wait until I got a couple of tanks of gas run through it, but I'm getting around 15-16 MPG. I don't think that's too bad for this type of vehicle. I even let it idle and warm up for a while. Most of the riding that I did was on road routes. (Some paved, some gravel, some hills) I would expect those numbers to go down in soft sand or mud. I haven't had a chance to plow with it yet because we haven't had any snow but that would also affect the numbers.
I also noticed the pressure that builds up in the gas tank. When I open the cap, there is a noticeable release of built-up pressure. Is there some kind of pressure relief valve on the tank that is not working properly? Is anyone else having this problem?
I attached a picture of the last 2 tanks of gas and the mileage that I got. I use an app called Fuelio to keep track every time I fill up.
View attachment 69