Aftermarket exhaust improve mpg?
#1
06-26-2007 | 05:33 PM
Thread Starter
Joined: Jun 2007
Posts: 1
Aftermarket exhaust improve mpg?
Hi, I willmost likelybethe owner of a Mazda 3S Sport in the near future, and I have a question about aftermarket exhaust. The extent of my knowledge of engines and how theyworkis limited, so this question mayseem very basic for some. The question is: does adding an aftermarket exhaust system improve mpg? I am debating whether I should get the better looking and faster Mazda 3SSportor the more fuel efficient and cheaperHonda Civic LX. Butif I could improvethe mpg on the Mazda 3by switching the exhaust,there would no longer be a comparison between the twofor me. If it could improve mpg, are there any products you guys would recommend? Thank you.
- Mike
- Mike
#2
06-26-2007 | 07:01 PM
Super Moderator
Joined: Mar 2007
Posts: 8,666
From: Manor, TX (Outside of Austin)
RE: Aftermarket exhaust improve mpg?
I didn't notice any changes after installing mine.
If it's fuel mileage you are mainly after, why not look @ the 3i 2.0 w/5-speed. If it's the S options you want, getone w/the sport and power packages. You can upgradenearly everything except the engine, of course.
#3
06-26-2007 | 07:15 PM
Senior Member
Joined: Oct 2006
Posts: 1,460
RE: Aftermarket exhaust improve mpg?
with my intake and cat back, i get on average 60-80 more km's to the tank.
this is because of the increase flow. the air has a much easier time coming into the engine, and a much easier time getting out.
i was surprised too at the increase fuel economy
this is because of the increase flow. the air has a much easier time coming into the engine, and a much easier time getting out.
i was surprised too at the increase fuel economy
#4
07-07-2007 | 06:56 PM
Joined: Nov 2006
Posts: 26
RE: Aftermarket exhaust improve mpg?
ORIGINAL: dentinger
with my intake and cat back, i get on average 60-80 more km's to the tank.
this is because of the increase flow. the air has a much easier time coming into the engine, and a much easier time getting out.
i was surprised too at the increase fuel economy
with my intake and cat back, i get on average 60-80 more km's to the tank.
this is because of the increase flow. the air has a much easier time coming into the engine, and a much easier time getting out.
i was surprised too at the increase fuel economy
#5
07-07-2007 | 09:36 PM
Senior Member
Joined: Oct 2006
Posts: 1,460
RE: Aftermarket exhaust improve mpg?
wat do u mean how much??
i get around an additional 80-100 km's per tank now.
and insane gas mileage on the highway now!! so, im guessing ~600 km's to one tank, if i dont stop.... i'll find out this summer....
i tihnk that answers ur question........
i get around an additional 80-100 km's per tank now.
and insane gas mileage on the highway now!! so, im guessing ~600 km's to one tank, if i dont stop.... i'll find out this summer....
i tihnk that answers ur question........
#6
07-08-2007 | 11:26 AM
Senior Member
Joined: Jan 2007
Posts: 235
From:
RE: Aftermarket exhaust improve mpg?
well with my 04 3i 2.0 auto i noticed a decrease in gas miliage as stupid as that sounds. I have an intake and full exhaust, header, ect. stock i used to get about 90-95 miles per quarter tank now i'm lucky 60 out of a quarter tank with using the same typical driving habits....The killer for me was putting that stupid header on because it shuts down the second oxygen sensor and it throws a cel saying that no activity in second 02 and then when your only running on one O2 sensor it tells the engine that you are running lean and idle speeds. So my compy tries to compensate but throwing a ton of gas in there. I back-fire like an srt-4 when i down shift and I can see my gas gage go down as I floor it. The depressing thing is my car uses gas like a v-8 with a 4 cyl power. Huge HP gain with that exhaust, Huge decrease in gas milage. im running around 170-175HP
#7
07-10-2007 | 07:36 PM
Joined: Jul 2007
Posts: 2
RE: Aftermarket exhaust improve mpg?
ORIGINAL: mzdaspd304
well with my 04 3i 2.0 auto i noticed a decrease in gas miliage as stupid as that sounds. I have an intake and full exhaust, header, ect. stock i used to get about 90-95 miles per quarter tank now i'm lucky 60 out of a quarter tank with using the same typical driving habits....The killer for me was putting that stupid header on because it shuts down the second oxygen sensor and it throws a cel saying that no activity in second 02 and then when your only running on one O2 sensor it tells the engine that you are running lean and idle speeds. So my compy tries to compensate but throwing a ton of gas in there. I back-fire like an srt-4 when i down shift and I can see my gas gage go down as I floor it. The depressing thing is my car uses gas like a v-8 with a 4 cyl power. Huge HP gain with that exhaust, Huge decrease in gas milage. im running around 170-175HP
well with my 04 3i 2.0 auto i noticed a decrease in gas miliage as stupid as that sounds. I have an intake and full exhaust, header, ect. stock i used to get about 90-95 miles per quarter tank now i'm lucky 60 out of a quarter tank with using the same typical driving habits....The killer for me was putting that stupid header on because it shuts down the second oxygen sensor and it throws a cel saying that no activity in second 02 and then when your only running on one O2 sensor it tells the engine that you are running lean and idle speeds. So my compy tries to compensate but throwing a ton of gas in there. I back-fire like an srt-4 when i down shift and I can see my gas gage go down as I floor it. The depressing thing is my car uses gas like a v-8 with a 4 cyl power. Huge HP gain with that exhaust, Huge decrease in gas milage. im running around 170-175HP
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