How do I increase my Ford Fiesta's fuel efficiency?

I recently purchased a Ford Fiesta and I love it, but I've noticed that it doesn't get as many miles per gallon as advertised. I want to know if there are any technical modifications I can make to improve its fuel efficiency. Any advice would be greatly appreciated!

Since the Ford Fiesta is designed to be a city car, it's important to use it for short trips rather than long ones. This will help your engine run more efficiently and improve fuel efficiency.

Have you checked your tire pressure? Under-inflated tires can lead to decreased fuel efficiency. Make sure to check them regularly and fill them to the recommended pressure.

You could also consider adding a cold air intake to your Ford Fiesta. This can increase engine performance and ultimately improve fuel efficiency.