Having the fuel tank of your vehicle full has several benefits. The first benefit is that your vehicle will always be able to drive. If your vehicle runs out of fuel, you will need to wait until the fuel tank is filled up again. When there is an emergency, you will want to make sure your vehicle is ready to drive. The last thing you will want to have to worry about is if your vehicle can make it there with the amount of fuel you have in the vehicle. This will help ensure the vehicle is reliable when you will need to drive it, no matter when it is.
In the winter you will want to keep the fuel tank to at least half full. If it gets lower, you increase the chance of condensation occurring. This will reduce the amount of fuel that you might actually have in the tank. You may suddenly find that your fuel tank does not have the same amount that you originally thought. Having the vehicle warm up before you drive is another benefit. Having a good amount of fuel in your vehicle will help to ensure the vehicle will warm up without running out of fuel.
Having the gas tank full will also be beneficial incase you find yourself in the ditch or in bad weather conditions. You will want to keep the vehicle running so the interior can keep you and your passengers warm. This is equally as beneficial if you are in stop and go traffic, or where traffic is stopped completely. You will not have to worry about where the nearest gas station is, besides worrying about the traffic around you. Always make sure your vehicle is in the best condition possible, so it can be as safe as possible on the roads.