R18 gas mileage question

ericsd241 · 11-11-2007, 12:31 AM

Before I added my Magnaflow catback system, my car was getting 35-40 mpg; and after I installed it I'm now getting lower mpg. I've had the catback since June and I'm now thinking about changing my short ram intake with a cold air intake; and maybe this might get my mpg back up.
Any suggestions?

Honda Civic 2006 auto ex K&N s/r Magnaflow catback system

Jardiniboy · 11-11-2007, 12:57 AM

It's really how you drive. I bet before you had your exhaust you were driving more conservative. With the exhaust you've been hitting WOT more often than average which will lead to less gas mileage.

kelmar · 11-11-2007, 01:02 AM

Additionally, your ECU is tuned to run with the stock components. Changing out those parts all affect how your car thinks it is performing and forcing it to make adjustments, often times having a direct effect on MPG, hp, torque, how rich/lean it runs, etc....

11-11-2007, 12:31 AM	#1 (permalink)
ericsd241 Junior Member Join Date: Nov 2007 Posts: 16 iTrader: 0 / 0%	R18 gas mileage question Before I added my Magnaflow catback system, my car was getting 35-40 mpg; and after I installed it I'm now getting lower mpg. I've had the catback since June and I'm now thinking about changing my short ram intake with a cold air intake; and maybe this might get my mpg back up. Any suggestions? Honda Civic 2006 auto ex K&N s/r Magnaflow catback system Last edited by ericsd241; 11-11-2007 at 12:44 AM.

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11-11-2007, 12:57 AM	#2 (permalink)
Jardiniboy Senior Member Join Date: Jan 2007 Location: Waipahu, Hawaii Posts: 3,818 Jasten iTrader: 2 / 100%	It's really how you drive. I bet before you had your exhaust you were driving more conservative. With the exhaust you've been hitting WOT more often than average which will lead to less gas mileage.

11-11-2007, 01:02 AM	#3 (permalink)
kelmar Senior Member Join Date: Apr 2007 Posts: 1,184 iTrader: 1 / 100%	Additionally, your ECU is tuned to run with the stock components. Changing out those parts all affect how your car thinks it is performing and forcing it to make adjustments, often times having a direct effect on MPG, hp, torque, how rich/lean it runs, etc....