Why does my Audi A4's Fuel Efficiency Drop in Winter?

I've noticed that my Audi A4's fuel efficiency seems to decrease significantly during the winter months, despite driving the same distance and with similar driving habits. Is this a common issue and how can I improve my car's fuel efficiency during winter?

One potential reason for decreased fuel efficiency in winter is due to the use of winter tires, which have deeper treads and can create more friction on the road. Consider switching to all-season tires to improve your car's efficiency.

Another factor to consider is the use of the heater in your car during winter, which can use a significant amount of fuel. Try using heated seats instead of the heater to save on gas.

Cold weather can also cause the air pressure in your tires to decrease, which can affect fuel efficiency. Make sure to regularly check and adjust your tire pressure during winter months.