What should I do to improve the fuel efficiency of my Ford Focus?

I have been noticing that my Ford Focus is not getting the mileage it used to. What can I do to increase its fuel efficiency?

First, make sure to keep up with regular maintenance, such as oil changes and tire rotations, to ensure your car is running at its best. Additionally, you can try driving at a constant speed and avoiding sudden accelerations or decelerations.

Consider using higher quality fuel for better performance and fuel efficiency. You can also try changing your driving habits, such as avoiding heavy traffic or using cruise control on highways.

Adding a cold air intake or performance exhaust can also improve fuel efficiency, but keep in mind this may void your warranty.