Went to 0 DTE, fueled and based on tank size, there were two gallons in the tank. Went to when it turned red and fueled up indicating 8 tenths of a gallon left. Reason for doing this was to know how far before actual empty in case i have a station that couldn't operate the pumps. This happened after the Northridge earthquake when power was out for over a day and gas stations couldn't operate their pumps. Knowing that i can still travel around 80 miles from 0 DTE. Don't plan on doing this regularly. I have another car that when is says low fuel, there is over 5 gallons left in the 19.8 gallon tank, which makes the warning useless. My old crown vic said empty when there were two gallons left. BTW i've only filled up 3 times. First tank was 40 mpg based on actual fuel used, not what the display said. Second tank was 40.2 mpg and third was 40.4 mpg all about half city and highway.