Why does the second half of the gas tank seem to go faster than the first half?
The gas gauge measures only what’s in your tank, not what’s in your car. What happens is that when you fill up your car, there’s a bit of extra gas that is in the pipe leading to your gas tank, but isn’t included in that measurement of your gas. Therefore, that first half DOES go more slowly because there is more gas there than your car has measured. Once you get down to that second half, there’s none of that extra gas left and you have an accurate measurement of how much gas you really have. Also, while you use your ENTIRE first half of your gas tank, you generally don’t use the entire second half because you go and fill up when you reach the red line (or sooner). That makes that second tank go faster as well.
