How can I improve my Ford S-Max's gas mileage?

I've noticed that my Ford S-Max's gas mileage has been decreasing lately. What can I do to improve it?

One way to improve your gas mileage is to make sure your tires are properly inflated. Underinflated tires can decrease your gas mileage by up to 3%.

Another way is to avoid aggressive driving and excessive idling. These habits can significantly decrease your gas mileage.

Regular tune-ups and maintenance can also improve your car's gas mileage. Make sure to follow your Ford's recommended maintenance schedule.