Real depends on the amount of climbing your doing also cause if you have to hold her to the bars or just half throttle. I can usually get 65-80 to empty in powder.
Mine just about always gets about 10 miles to gallon. Deeper powder maybe 8 - 9 mpg we are by no means wide open all the time except for this comming weekend, 2 - 3' fresh.
I was out 2-9-11 2-3ft fresh fun stuff but the light came on at 40 miles. Went about 5 more and just about ran out. Was like riding my viper in deep snow only half as much gas. got to love the air system never missed a beat all day hood was covered all day