How can I improve the gas mileage of my Ford S-Max?

I have been noticing that my Ford S-Max's gas mileage is not as good as it used to be. Are there any tips or tricks to improve it? Any help would be appreciated!

You can start by keeping your tires properly inflated and using the recommended grade of motor oil for your car. Also, avoiding rapid acceleration and heavy braking can greatly improve gas mileage.

Another helpful tip is to plan your trips efficiently and combine errands to minimize unnecessary driving. And don't forget to remove any unnecessary weight from your car.