Gas mileage after X

J

jas142

Founding Member

Feb 11, 2002

1,358

0

0

Mar 30, 2004

#1

• Mar 30, 2004

• #1

Anyone else notice a decrease in gas mileage after the O/R x? I also seem to feel that its running kinda rich.

 

JonJon

Founding Member

Aug 16, 2002

4,801

1

68

back in Marylands

Mar 30, 2004

#2

• Mar 30, 2004

• #2

decrease
i think i'm rich too
still waiting to get dyno'd

 

cap42

New Member

Jul 23, 2003

398

0

0

Bolingbrook IL

Mar 30, 2004

#3

• Mar 30, 2004

• #3

Ya I lost some gas milege and I'm running a bit rich not horribly just lost about 20-30 miles per tank...still haven't gotten a tune either

 

GoBabyVroommm

Active Member

Mar 22, 2003

1,156

0

36

Chicago, For Realss???!!!

Mar 30, 2004

#4

• Mar 30, 2004

• #4

When i put the o/r h-pipe my gas mileage got better. It wasn't tell i got on it it went down faster but that is only because it gave me more hp. The x pipes gives you more hp than the h pipe. Your gas will go down faster if you floor the car.

 

JonJon

Founding Member

Aug 16, 2002

4,801

1

68

back in Marylands

Mar 30, 2004

#5

• Mar 30, 2004

• #5

GoBabyVroommm said:

When i put the o/r h-pipe my gas mileage got better. It wasn't tell i got on it it went down faster but that is only because it gave me more hp. The x pipes gives you more hp than the h pipe. Your gas will go down faster if you floor the car.

Click to expand...

my gas went down on long highway trips where i avg'd 23mpg before on 450 mile trip
but now i get 20mpg on the same trip

 

road rage

New Member

Dec 14, 2003

433

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0

R.I.

Mar 30, 2004

#6

• Mar 30, 2004

• #6

I've noticed a decline in gas mileage since the x pipe and I too am running a little rich.

 

4.6MustangSteve

New Member

Jun 13, 2003

219

0

0

Northern VA, USA

Mar 30, 2004

#7

• Mar 30, 2004

• #7

I have noticed a bit of a decline in mileage... It's not much, though... Maybe 20 miles per tank.

 

Ryan02Stang

Active Member

Jun 17, 2003

1,181

0

36

Arlington Heights, Illinois

Mar 30, 2004

#8

• Mar 30, 2004

• #8

I'm glad im not the only one noticing this...i noticed about 30 miles less per gallon after the O/R X...i need a tune!

 

Y

yamie700

New Member

Aug 27, 2003

67

0

0

MN

Mar 30, 2004

#9

• Mar 30, 2004

• #9

I noticed a little decline in gas mileage also, probably mostly due to me giving it more gas just to hear the exhaust though
I thought that our stock computers would adapt to the new pipe and eventually lean things out a little?? I do have MIL eliminators on though so maybe that would cancel out the computer being able to adjust?

 

8

8yourZ06

New Member

Feb 16, 2004

128

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0

Mar 30, 2004

#10

• Mar 30, 2004

• #10

Just thought I would make mention of this if anyone was interested. Your car seeming to run richer and the fact your gas milage decreased go hand in hand. Your rear O2 sensors are not heating up to normal operating temp. Your engine running a little richer when cold is normal but as the temp. of your O2 sensors increases it aids in leaning out your air/fuel mixture. If you desire to correct this your best bet is to have your computer reprogrammed.

 

CBASS

Founding Member

May 4, 2000

853

0

17

Wichita, KS

Mar 30, 2004

#11

• Mar 30, 2004

• #11

Your rear O2s have nothing to do with engine management, they are there to just sniff for cats. The fronts ones are the ones that the engine uses for fuel control.

BTW, how much louder is your off road X-pipe compared to the stock H-pipe?

 

03-s281

New Member

Jan 20, 2004

421

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0

Stangville,TN

Mar 30, 2004

#12

• Mar 30, 2004

• #12

I can tell I lost some noticeable torque but feels stronger up top.
The sound is worth it. Can't tell about gas mileage.
How can you tell if its running rich?

 

Y

yamie700

New Member

Aug 27, 2003

67

0

0

MN

Mar 30, 2004

#13

• Mar 30, 2004

• #13

I installed the x pipe and magnaflows at the same time so I just know it is much louder than stock; but only when you get on it. Just cruising around it is barely louder than stock. I also noticed a little loss of down low torque but the gains from about 3500rpm on are great and more than make up for the loss.