It is always a good idea to keep your gas tank full of gas. Especially on a long trip where you may not know where the next nearest gas station is. It is also a good idea to keep the tank full because it can reduce the problems that you may have. When your gas level goes down, the amount of air that is ion your tank goes up.
Air has condensation in it, and if this condensation gets into your fuel lines and freezes, you are going to have some issues. Namely, your car will not start if the…