How to improve fuel efficiency in my Kia Rio?

I have been noticing that my Kia Rio's fuel efficiency is not as good as it used to be. What could be causing this and how can I improve it?

One possible reason for decreased fuel efficiency could be the air filters. Make sure to check and replace them regularly for optimal performance.

Another factor could be tire pressure. Improperly inflated tires can greatly affect fuel efficiency. Check and adjust the pressure according to the manufacturer's recommendations.

Using cruise control on highways can help maintain a constant speed and save fuel. Also, avoid excessive idling and aggressive driving.