those damn countdown mileage guesses aren't very trustworthy. The idiot light pops up with one gallon left, but the range estimation? From 31 miles to "Good Luck!" in one mile

Compare the top and bottom images with the odometer 15681 and 15682, and the estimated range: from 31 to ---. I was at the gas station for the bottom photo (Hence parking brake and door open) and there was a half gallon left in the tank