What is the most efficient way to increase gas mileage in a Ford S-Max?

I recently purchased a Ford S-Max and noticed that its gas mileage is not as good as advertised. Are there any specific techniques or maintenance tips that can help improve its fuel efficiency?

The first thing you can do is regularly check and replace your air filter. A clogged air filter can significantly reduce fuel efficiency.

Another way to improve gas mileage is to properly inflate your tires. Underinflated tires can increase resistance and decrease fuel efficiency.

Make sure to use the recommended grade of motor oil for your Ford S-Max. Using the wrong oil can also impact fuel efficiency.