The official Kia Motors website says that the gas tank in the 2.4 SX (my car) is 13.7 gallons. This cannot be possible, because no matter how much I fill the tank, I can't even squeeze 200 miles out of it. Most I've ever gotten out of a complete fill-up was 192 miles, and that was only after I literally squeezed so much extra gas into the tank that it was pouring out of the side. So, my question is, is the tank really that small, or is it another problem like the spark plugs? Or the sensor? Thanks in advance.