Hfc + cbe = mpg
 

With all of the discussions going on about which exhaust/high flow cats has the best sound, I am interested in what (if any) increase or decrease in the miles per gallon has been noticed. I am going to pull the plug next week on a Invidia Gemini CBE, CNT HFCs and K&N filters. Although I am more interested in the new found sound and performance of the new exhaust system, I am curious if the MPG is affected? I would guess that the MPG would increase slightly (if you can keep your foot out of it).

My question to you is: "Why are you concerned with MPG?". Just a question.

I'm not really concerned about the MPG, but I thought it may be a good topic for discussion. By the way, the Z gets better mileage than my 2003 Hyundai Santa Fe.

Fair enough. Just seems moot to me.

Valid question considering some part manufacturers advertise an increase in mpg. :icon14:

If your not throwing a code the mpg increases. I gained a minimum of 1/2-1 mpg with no code. Then SES kicked on and that dropped 2 mpg. I'm obviously running a tad rich :P

Ses?

Sex Engine Light or Service Engine Soon........it's one of those

I think my Wife needs a Sex engine light so I can stop guessing when she's in the mood. Hell throw in an OBD2 sensor so I can figure out what code she's throwing when she's pissed.

LOL! :icon18:

It's been scientifically proven that your mpg goes way down because you can't keep from revving it out to hear that sweet exhaust sound.


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I agree. However, more power from the same size engine usually means you have improved efficiency. More efficiency usually means better mileage, which is usually cancelled out wth your right foot.

Haha I used the mpg argument with my parents back in the day to make them let me get an intake on my civic. It worked too. But yeah, right now all I have is the Stillen G3 cai's and I step in it every chance I get to hear her growl at me some :)


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Definitely get your car tuned if it's throwing a code... Mpg goes down the drain. I averaged 16.7mpg with 70% freeway driving on my last tank of gas. before the code I was averaging about 19mpg 50/50 city/freeway.:shakes head: