What does the ECO button do in the Kia Rio?

I recently bought a Kia Rio and noticed there is an ECO button. What does it do and should I be using it?

The ECO button adjusts the engine and transmission to improve fuel efficiency. It can also turn off certain features like the AC to save even more fuel. It's best to use it when driving on highways or long distances. However, in city traffic or stop-and-go situations, it is better to turn it off to maintain better performance.

I have found that using the ECO button has saved me a significant amount of money on gas. It's definitely worth using if you want to save on fuel costs.

I always use the ECO button and have not noticed any negative impact on performance. It's a great way to be more environmentally conscious and save some money at the same time.