How can I increase fuel efficiency in my Kia Rio?

I have noticed that my Kia Rio's fuel consumption is higher than the advertised efficiency. What steps can I take to improve its fuel efficiency?

Regularly check and replace faulty oxygen sensors, as they can cause an increase in fuel consumption.

Make sure your tires are properly inflated to the recommended pressure, as under-inflated tires can decrease fuel efficiency.

Avoid idling for long periods of time and combine short trips into one longer trip, as frequent stopping and starting can decrease fuel efficiency.