Why is the Ford Fiesta's gas mileage so high compared to other cars in its class?

I've noticed that the Ford Fiesta gets significantly better gas mileage than other cars in its class, like the Honda Fit and Toyota Yaris. Is this due to the engine or something else? Should I be worried about reliability or performance?

The Ford Fiesta's gas mileage is a result of its efficient 1.0L EcoBoost engine and aerodynamic design.

I would recommend getting a Fiesta with the 1.0L EcoBoost engine for the best gas mileage. As for reliability, the Fiesta has a good track record but regular maintenance is key.

You should also keep in mind that driving habits and road conditions can affect gas mileage. Consider driving more efficiently and planning your routes to maximize fuel efficiency.