Why does my Kia Ceed have low fuel efficiency?

I recently bought a Kia Ceed and I've noticed that it doesn't seem to have the fuel efficiency that was advertised. What could be causing this issue?

Low tire pressure can greatly affect your car's fuel efficiency. Make sure to check and adjust your tire pressure regularly.

Another common culprit for low fuel efficiency is a dirty air filter. Consider replacing your air filter to improve your fuel efficiency.

Driving habits can also have a big impact on your fuel efficiency. Avoid aggressive driving and maintain a steady speed for optimal fuel efficiency.