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Old 01-05-2024, 11:03 AM   #1 (permalink)
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Thumbs up Fuel economy improvement after air filter change

Hi guys,

I know there have already been some discussions on air filters and their impact on better gas mileage. I just used some numbers of my tracked fuelings to compare the fuel consumption prior and after changing the air filter on my car. Car is a 2017 Honda Civic with a 1.5 liter turbo engine.

So a short back story, I drove 37,000 miles (60k kilometers) without changing my air filter even once. This wasn't on purpose, the maintenance minder on my car didn't work properly. That's how the air filter was looking:



Here are my numbers:

I summarized my fuel consumption on 12,500 miles (20k kilometers) prior to the air filter change. The air filter had already been pretty dirty and I got an overall fuel consumption of 38.4 mpg (6,13 l/100km).

On 12,500 miles (20k kilometers) driving with the new paper air filter I got 41,7 mpg (5,64 l/100km).

I know it's only a small improvement and of course I can't even tell, if the air filter is the reason for that drop in fuel economy but I thought it might be interesting for some of you guys.

CVTCivic

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Old 01-06-2024, 12:46 PM   #2 (permalink)
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Good post, I have to keep reminding myself that I live on a dirt/gravel road now and should be changing my filter more frequently.

I think 3 mpg is a pretty big difference myself.
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Old 01-17-2024, 11:52 AM   #3 (permalink)
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Did you had consistent consumptions over every fuel stop during the 12,500 mile runs? I don't know for sure for turbocharged engines but for a naturaly aspirated enigne it should not make a difference at all since with the clogged up filter the throttle body would just open more. That will cost you power at the top end but should do nothing to the fuel consumption.
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Old 01-31-2024, 03:40 PM   #4 (permalink)
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Quote:
Originally Posted by Eisberg View Post
Did you had consistent consumptions over every fuel stop during the 12,500 mile runs?
My fuel consumption isn't consistent at all. Sometimes I'm driving a lot on the Autobahn and sometimes I'm only doing short trips, from which I get bad mpgs obviously. So it's just a median value.

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2017 civic x, air filter, airfilter, honda civic 1.5t

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