Why is the Kia Stonic's fuel efficiency so impressive?

I am considering purchasing a Kia Stonic and I noticed that its fuel efficiency is highly praised. What makes it stand out compared to other cars?

The Kia Stonic utilizes a combination of advanced engine technology and aerodynamic design to achieve its impressive fuel efficiency.

In addition to its efficient engine, the Kia Stonic also has features such as automatic stop/start functionality and regenerative braking, which help to conserve fuel.

I own a Kia Stonic and I can attest to its impressive fuel efficiency. I can drive for days on a single tank of gas, which has saved me a lot of money on refueling.