For what it's worth, my OEM level 2 IPC did this exactly, and so does my Mondeo IPC. Mondeo one isn't quite as obnoxious, but it still does it.This is incorrect, on my car. Gets to 1/4 tank, then drive 20 miles, it adds almost another 3/16 of a tank and miles to empty goes up by 60 or so. Then drive more and it eventually drops super fast (dropping from 160 miles to empty, to empty in about 80 miles). It does it over and over. It is something in the variable resister in tank float. Not even sure a new FORD unit would fix it.
Sent from my SM-G975U using Tapatalk