How to increase fuel efficiency in my Ford Focus?

I have been noticing that my Ford Focus has been guzzling up a lot of gasoline lately. Is there anything I can do as an owner to increase its fuel efficiency?

You can try reducing the weight of your car by removing unnecessary items in your trunk. This will help improve your car's fuel efficiency.

Another tip is to keep your tires properly inflated. Underinflated tires can decrease fuel efficiency.

Consider using a fuel additive to help clean your engine and improve gasoline burn.