Why is the fuel efficiency of the Ford Fiesta so impressive?

I've been considering purchasing a Ford Fiesta, but I'm curious as to why its fuel efficiency is so highly praised. Can someone explain the technical aspects that contribute to its impressive fuel economy?

The Ford Fiesta's fuel efficiency is due to its lightweight design and efficient EcoBoost engines. On top of that, it also has advanced features such as auto start-stop technology and regenerative braking that further improve its efficiency.

As a Ford Fiesta owner, I can attest to its impressive fuel efficiency. The lightweight design and EcoBoost engine combination makes it a standout in its class. Plus, the added convenience of the EcoBoost Fuel Economy Package only enhances its already impressive efficiency.

I've been a mechanic for over 10 years and have worked on many Ford Fiestas. From a technical standpoint, the engine's turbocharging technology and precise fuel injection system contribute to its high fuel efficiency.