Here’s Why You Shouldn’t Let Your Gas Tank Get Too Low Photo: The News Wheel If you’ve got a combustion-engine vehicle, then you’re probably familiar with the dreaded gas pump light. And while it’s easy to ignore, there are potential consequences to leaving your vehicle’s gas tank nearly empty. Here’s a look at why you should keep your car’s gas tank above one-quarter full. Fuel line freezes Under chilly conditions, a low gas tank can lead to a frozen fuel line. In the absence of fuel, your car’s gas tank is mostly filled with air, and the accompanying moisture it brings. That moisture can freeze and clog up the fuel line, which can prevent your car from starting. Don’t get stranded in the cold — keep an eye on that fuel gauge and hit the pump when necessary.