What is the best way to increase the fuel efficiency of my Ford Fiesta?

I recently purchased a Ford Fiesta and have noticed that the fuel efficiency is not as great as I expected. I was wondering if there are any tips or modifications I can make to improve it? Thanks!

Some tips to increase fuel efficiency for your Ford Fiesta include keeping your tires properly inflated, avoiding excessive idling, and avoiding aggressive driving habits.

You can also consider using synthetic oil, which can improve engine performance and gas mileage. Another option is to install a cold air intake, which can increase airflow and improve fuel efficiency.