How to improve the fuel efficiency of a Kia Rio?

I just bought a Kia Rio and I feel like I am spending too much on gas. What can I do to improve its fuel efficiency?

Regularly maintain your car by checking and replacing its air filter, spark plugs, and oil. These can greatly affect your car's fuel efficiency.

Avoid aggressive driving and speeding, as it can significantly decrease your car's fuel efficiency.

Consider using a fuel-efficiency device or add-on to your car, such as a fuel saver chip or a more aerodynamic spoiler.

Try using a higher-octane gas for better performance and efficiency.