How do I improve my Ford S-Max's fuel efficiency?

I've noticed my Ford S-Max has been using a lot of gas lately. What steps can I take to improve its fuel efficiency?

Making sure your tires are properly inflated can greatly improve your car's fuel efficiency. Also, try driving at a steady speed and avoiding excessive idling.

Regularly changing your air filter and using the recommended grade of motor oil can also help improve your car's fuel efficiency.

Consider getting a tune-up if your car hasn't had one in a while. This can help improve your car's overall performance and fuel efficiency.