Keeping your vehicle's gas tank full during the winter has a number of benefits, according to VIP Automotive Group.
Tires have a harder time gripping the roads in icy conditions, so that extra weight of the gas will help provide a bit more traction for the rear tires. Leaving a lot of space in the gas tank also offers room for condensation. That moisture can freeze up during really cold weather. If that moisture is in the fuel lines, it can freeze and cause problems. Keeping a full tank helps eliminate the probability of condensation.
A full tank also offers more convenience and can come in handy should the vehicle get stuck in snow or on ice. Keeping the car running provides heat for the driver and passengers inside, so the more gas available, the better.
Finally, a full tank also means fewer stops at gas stations, which comes in handy on road trips or even locally. This way you won't have to stop at a station when the weather gets really bad or really cold, or when slush and slop create a mess near the gas pumps.