Originally Posted by Bibolt
Yah this was the reason of my blowing fuel pumps kept blowing, letting the fuel tank to get empty. Now I try not to do that, even sometimes I have to, to measure how is the fuel economy mpg
There's absolutely no reason to do that. A simple alternative is to fill up with gas when your gauge reads exactly half full. Record the number of gallons it took to fill it up again, and divide that into the number of miles you get until the tank is exactly half full again. Remember you want miles per gallon, not miles per tank.