I have had my car for a little over a week . Today was the first time I had to buy gas. The light went on when I got onto the freeway. 33 miles later I stopped to get gas. I purchased 9.987 gallons so I guess I was pretty empty. I averaged 65.8 mpg this morning. So now I have created a math problem.
One time I did run out of gas after I went about 40 to 50 miles after all the little bars that represent fuel were gone. I did it on purpose to see at what point it does run out. I stayed in town the whole time during the "test" and carried a new plastic gas can the whole time. This was about 5 years ago.