What are some common issues with the Kia Picanto's fuel efficiency?

I've noticed that my Kia Picanto is not getting the same fuel efficiency as it used to. What could be causing this and how can I improve it?

One common issue that could affect your fuel efficiency is a dirty air filter. Make sure to regularly check and replace your air filter to improve fuel efficiency.

Another factor could be underinflated tires. Make sure to check your tire pressure regularly and inflate them to the recommended levels.

Using low quality or expired fuel can also greatly impact your car's fuel efficiency. Make sure to fill up at reputable gas stations and to use fresh fuel.

Regular maintenance, such as oil changes and tune-ups, can also help improve your fuel efficiency and prevent any potential issues.