Why does my Kia Picanto have poor fuel efficiency?

I recently purchased a Kia Picanto and have noticed that it has poor fuel efficiency compared to the advertised numbers. What could be causing this issue and how can I improve it?

It is possible that you are not driving the car efficiently, try to accelerate gradually and avoid sudden braking. Also, make sure your tires are properly inflated.

Check the air filter, if it's dirty or clogged, it can decrease your fuel efficiency. It's an easy and affordable fix.

You may want to check the spark plugs, if they are worn out or dirty, they can impact your fuel efficiency. It's recommended to change them every 30,000 miles.