2012 Honda Civic | The Car Community | Page 1

abstract mortar Mar 7, 2023, 7:41 AM

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My car has been getting bad gas mileage recently, I usually fill up at Costco. I filled up once at shell and magically my fuel usage dropped, any reason

rain dew Mar 7, 2023, 7:57 AM

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How much did it drop?

slate drift Mar 7, 2023, 12:44 PM

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Costco and Shell are both TOP TIER™ gasoline so I wouldn’t expect such a difference

graceful pumice Mar 7, 2023, 1:00 PM

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"Fuel usage dropped" as in MPG got better (using less fuel) or got worse (go less far on same fuel)?

Either way, how much was the difference?

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....and do you perhaps have a clogged intake filter? Maybe the car can't breathe

abstract mortar Mar 7, 2023, 2:34 PM

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It was pretty major

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Like 3, 4 L/100km differences

#2012 Honda Civic