How do I optimize fuel efficiency in my Audi A1?

I recently bought an Audi A1 and I noticed that it's not getting the fuel efficiency that I expected. What are some ways that I can improve my car's fuel efficiency?

Make sure your tires are properly inflated, as under-inflated tires can decrease fuel efficiency.

Avoid idling for long periods of time and use cruise control on the highway to maintain a consistent speed.

Regularly change your air filter and keep up with general maintenance to ensure your car is running at its most efficient.