I would guesstimate the avg. mpg’s to be 15-18 and i know it gets better when the check engine light was on so I am guessing the engine light is an o2 sensor killing the gas mileage.
It is a beast in the snow…only time it has ever not started for me is when the fuel pump died. So thats a few month old ford unit $350 bux and new plug wires at that time.