Why is my fuel consumption increasing on long drives in the Audi A3?

I have noticed that when driving for longer periods of time, my Audi A3 seems to use more fuel than usual. Is there a specific reason for this?

It's likely due to increased aerodynamic resistance from driving at higher speeds for extended periods of time. To improve fuel efficiency, try maintaining a constant speed and avoiding aggressive acceleration.

A common cause is the use of air conditioning on long drives, as it can significantly increase fuel consumption. Try using it sparingly or turning it off when not necessary.