I just got my car today, and I'm not quite sure I understand exactly what's going on here, but I have the opportunity to test this out. The name of my street is Pinnacle, so as you might guess the first mile of my commute is downhill at a pretty good grade. I believe the elevation drops 400 ft in a mile. (i know bc I run down it, and unfortunately back up). I will drive down it with a full battery tomorrow will hill assist on. Monday I will try it in low gear. what exactly is it that you want me to look out for tho? MPGe?