Why does my Kia Soul's fuel efficiency decrease over time?

I've noticed that my Kia Soul used to get great gas mileage, but now it seems like it's using more fuel. What could be the cause of this and how can I improve it?

It's possible that your Kia Soul's air filter is dirty or clogged, which can lead to decreased fuel efficiency. You can try changing the air filter to see if that improves your gas mileage.

Another reason for decreased fuel efficiency could be low tire pressure. Make sure to regularly check and inflate your tires to the recommended level. This can greatly improve your gas mileage.

If you've recently changed your driving habits, that could also be a contributing factor. Aggressive driving, such as rapid acceleration and braking, can decrease fuel efficiency. Try to drive more smoothly to see if it makes a difference.