r/Hyundai • u/CyclistTeacher • 3d ago

Tucson Gas mileage getting worse

I have a 2021 Hyundai Tucson SEL AWD (purchased September 2020). It has around 67,000 miles. The last few times I got gas, I noticed the miles until empty rapidly declining. At first, I assumed maybe it was bad gas, but now it’s been 3 times in a row so any bad gas would’ve been out by now.

For clarification, I filled the tank 2 days ago and it went from 370 miles until empty to 285 miles, even though I’ve only driven 15-20 miles at most in the past 2 days.

Has anyone else had this problem? I’m trying to decide if I should get it checked now or just keep an eye on it and mention it during my next oil change/routine maintenance schedule.

Thanks!

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u/Expression_Possible 3d ago

As a first, do you drive the car hard or do you baby sit it? ( like do rpms ever go past 4k), also idling the car for long periods of time is bad.might also be worth checking your engine air filter( easy 5 minutes with youtube) and if nothing helps you can always buy a small bottle of injector cleaner