Why is the Audi A3's fuel efficiency lower in winter?

I've noticed that my Audi A3's fuel efficiency decreases during the winter months. Is this a common issue and is there anything I can do to improve it?

Winter weather, specifically colder temperatures, can have a significant impact on the fuel efficiency of your Audi A3. Colder air is denser, which means your engine needs more fuel to maintain the same level of performance. To combat this, try using a winter fuel blend or investing in an engine block heater to warm up the engine before starting.

It's not just the colder temperatures that affect fuel efficiency, but also winter driving conditions like snow and ice. These conditions require more energy from your engine and can result in decreased fuel efficiency. Consider investing in winter tires to improve traction and reduce the strain on your engine.