Thanks. Just didn’t seem like it we were out there that long to run low. I guess it’s possible. Thanks.
They don't take off with full tanks if they can help it because fuel weighs about 8 lbs./gallon, and weight = $$$ spent so if they think they can make it to the next stop with the fuel on board they take off. Of course they maintain a certain reserve and in your case, the reserve got too close to zero or below zero.
You do it yourself in your car because you don't stop at every gas station.