Most drivers dread the winter season as it poses a real challenge to the fuel efficiency of their vehicles. During these seasons, temperatures drop below the freezing levels hence the fuel inefficiency of most vehicles. The conventional gasoline-powered vehicles experience a gas mileage drop of up to 12% when temperatures drop to 20 degreesSeveral reasons cause such fuel inefficiency. Here are some of those reasons that contribute to this scenario:The engine requires time after ignition to reach its optimal fuel-efficient temperature. During winter, this takes longer and driving over shorter distances adds to the fuel inefficiency.Reduced tire pressure during winter reduces the traction of tires, which in turn leads to increased resistance.Winter gasoline supplied by gas pumps provides less energy per gallon than the regular gasoline.Aerodynamics also contribute to fuel inefficiency as the cold air causes drag, especially at high speeds.Features such as heated seats and defrosters draw more power from the vehicle, which leads to more fuel consumption.