Why is my Kia Niro's fuel efficiency decreasing?

I've had my Kia Niro for a few months now and noticed that the fuel efficiency has been decreasing. I used to get around 50 mpg, but now I'm only getting around 40 mpg. What could be causing this decrease in fuel efficiency?

It's possible that there could be an issue with your car's fuel system. I would recommend taking it to a trusted mechanic to get it checked out.

Have you been driving differently? Increased city driving or more frequent use of air conditioning can affect fuel efficiency. Keep track of your driving habits and see if there's been a change.

Another factor to consider is the type of gas you're using. Lower quality gas or using the wrong type of gas can also decrease fuel efficiency. Make sure you're using the recommended type of gas for your Kia Niro.