2017 Ford Fusion mileage to Empty varies

Lately when I start my car I let it warm up my gas on the digital will read “155 miles to E” and i’ll Drive .5 miles or less and it’ll Be at 84 Miles to E. Does Anybody know what can this be ?

Yes, because youmlet the car warm up, it is getting 0 miles per gallon and the xxx miles to empty recalculates the distance you can travel based on that. Perfectly normal.

Stop idling your car to warm it up, it isn’t good for your car, and that situation will go away.