Why is my Kia Sorento's gas mileage decreasing?

I've noticed recently that my Kia Sorento's gas mileage has been decreasing significantly. I used to get around 25 mpg but now I'm lucky to get 18 mpg. What could be causing this and how can I improve my gas mileage?

It's possible that there is an issue with your fuel system, such as a clogged fuel filter or dirty fuel injectors. You may also want to check your tire pressure as low tires can decrease gas mileage. Additionally, regular maintenance such as oil changes and tune-ups can help improve gas mileage.

Have you recently installed any aftermarket parts or accessories? Sometimes these can affect gas mileage. Also, make sure you're not carrying excess weight in your vehicle as that can also decrease gas mileage.

In cold weather, gas mileage can decrease due to the engine working harder to warm up. You may also want to consider changing your driving habits, such as avoiding quick accelerations and maintaining a consistent speed.