How do I maintain optimal fuel efficiency in my Audi A3?

I recently purchased an Audi A3 and I want to make sure I am getting the best fuel efficiency possible. How can I maintain my car to achieve the best gas mileage?

Regularly check your tire pressure and keep them properly inflated. This can greatly impact your fuel efficiency.

Make sure to change your air filter every 12,000 miles or as recommended by the manufacturer. A dirty air filter can reduce gas mileage by up to 20%.