I did a little experiment. Driving home from a long trip my out of gas indicator started blinking. My range said I had about 8 miles left to my house. Knowing it was only about 3 miles I decided to just go home and charge over-night and then go to the gas station. About 1/2 way home my range was down to zero, there are hills I have to go up, so the range calculation is off. It was a bit scary driving with the gas gauge blinking and my range a zero but I made it home. The next day I drove to the gas station on EV and the car only took 8.6 gallons. Moral of the story--in my case at least--there is about 2 gallons left when the car tells you you are out of gas and you have zero range.