I did some searching and didn't find exactly what I was looking for, so sorry if it IS already out there. Why does my gauge go from full to medium to empty and then back to full. I fill it up at the pump and when I unload it, it only shows half full. It seems like it bounces around all over the place. And yes I thought that maybe I'm not parked on level surface every time and yes I have thought it bounces around because I am but no. Sitting at rest on level surface it varies almost constantly. Crappy unreliable gauge or am I missing something? Careful answering that please