What is the most efficient way to improve the gas mileage on a Ford Focus?

I have been driving my Ford Focus for a few months now and have noticed that it is not getting the gas mileage that was advertised. Is there any specific technique or maintenance that I should be following to improve the efficiency of my car?

To improve gas mileage on your Ford Focus, make sure to keep up with regular oil changes and tire rotations. Additionally, try to accelerate and decelerate smoothly and avoid unnecessary idling.

I have found that changing the air filter and spark plugs on a regular basis can help improve gas mileage. Also, avoid using the air conditioning as much as possible.

In my experience, using high quality fuel and keeping your tires properly inflated can make a big difference in gas mileage. Also, try driving at a slower speed on the highway.