Why is my Kia Niro experiencing a decrease in fuel efficiency?

I recently purchased a new Kia Niro and noticed that its fuel efficiency has decreased significantly. I have followed all maintenance recommendations and drive carefully. What could be causing this decrease in fuel efficiency?

It is possible that your Kia Niro is experiencing a mechanical issue, such as a faulty oxygen sensor or clogged fuel filter. It is recommended to take it to a certified mechanic for a diagnostic test.

Have you been driving in stop-and-go traffic or using aggressive acceleration? These driving habits can greatly decrease fuel efficiency. Try using cruise control on highways and avoiding heavy traffic when possible.

Are you using the correct grade of gasoline for your Kia Niro? Using a lower grade can impact fuel efficiency. Check your owner's manual for the recommended type of fuel.

Have you recently added any heavy cargo or roof racks to your Kia Niro? The extra weight can cause a decrease in fuel efficiency. Consider removing unnecessary items to improve efficiency.