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Bad gas mileage - Help

2422 Views 25 Replies 13 Participants Last post by  Old n’ slow
Hey everyone, I'm new here and this is my first post. I have a 2022 Kia Rio with the technology package. And I'm having bad gas mileage compared to the first month I've had it. The first month I was getting an average of 32-35 mpg, now I'm getting 22-27 avg. My driving has stayed the same, in fact I think I baby it more to see if I can save gas or get better gas mileage. The only thing I did purchase was a new K&N drop in OEM replacement filter.

I am thinking of replacing the filter back to the original and see if it helps. But I would like to stick with the KN filter for better air flow.

Is there a calibration or something I need to reset after I install the filter?

Does Anyone else have an issue like this, or had?

What was your fix?

Any help is appreciated.

Thank you in advance.
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How are you calculating it? By computer or by hand? The computer is typically in the ballpark for me but it's still off by varying degrees when I compare with calculating at the pump.

I'd say it's worth trying out the old filter for a tank and switching back to see if there's an obvious difference since I'm wondering if the increased airflow makes any difference for your car.
Maybe turn off the eco setting.
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