Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > AccessPort

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 10-23-2006, 01:52 PM   #1
smac
Scooby Newbie
 
Member#: 119196
Join Date: Jul 2006
Default Cobb Stage 2 but my gas mileage SUCKS....

What can I do to get better gas mileage? I am only getting about 290-300 on a full tank of gas. I know I should be getting more according to others on this forum and others right? Is a pro tune the only fix to this issue? It is my daily driver back and fourth to work and I need better gas milage. I thought after going stage 2 and staying off the heavy gas I should get 25 city and 28ish highway. Am I mistaken? Please help.
* Registered users of the site do not see these ads.
smac is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-23-2006, 02:00 PM   #2
jmhubbard01
Scooby Specialist
 
Member#: 126003
Join Date: Sep 2006
Chapter/Region: South East
Location: South Carolina
Vehicle:
2019 BMW X3M40i
Alpine White

Default

Stay off the boost to get better gas mileage for sure... I've never really checked my gas mileage but I can sure tell on the PDX maps if I drive hard and stay on boost it doesn't get good mileage (of course).

Do you have a boost guage?
jmhubbard01 is offline   Reply With Quote
Old 10-23-2006, 02:01 PM   #3
Zsbaug24
Scooby Newbie
 
Member#: 86881
Join Date: May 2005
Chapter/Region: MAIC
Vehicle:
2006 WRX STI
WR Blue Pearl

Default

Im amazed you think thats horrible mileage, thats what i get on my stock STI. In fact I tend to get ~19.5 MPG which is around 260-70 when the light kicks on. Thats not horrible mileage at all really. Just the price you pay for all that extra oomph. A protune would probably help though, lean it out a bit which should provide a tad more mileage.
Zsbaug24 is offline   Reply With Quote
Old 10-23-2006, 02:08 PM   #4
AllAWD
Scooby Specialist
 
Member#: 17079
Join Date: Apr 2002
Chapter/Region: MAIC
Location: Alexandria, VA
Default

I doesn't seem like you are that far off from me depending on how many gallons a full tank is. I'm running a stage 2 and usually fill up 12 gal at about 300mi. I have been getting 25 mpg, with more highway than city. I tried for a couple tanks to conserve (BTW, the econo map got me worse mileage) but it didn't really help 26 mpg versus 25 mpg.

Also I'm approaching 60k, so hopefully new fluids, plugs and filter will help some.
AllAWD is offline   Reply With Quote
Old 10-23-2006, 02:19 PM   #5
rallysquirrel
Scooby Specialist
 
Member#: 7006
Join Date: May 2001
Chapter/Region: NESIC
Location: Clifton Park, NY
Vehicle:
2007 SpecB

Default

I was usually getting 300 miles with my STOCK wrx. I say you're good.
rallysquirrel is offline   Reply With Quote
Old 10-23-2006, 02:26 PM   #6
Honest Bob
Scooby Specialist
 
Member#: 94698
Join Date: Aug 2005
Chapter/Region: Tri-State
Location: Easton, PA
Vehicle:
2005 30R Wagon
CGM

Default

I can consistently get at least 300mpg, sometimes 320 if I'm extra carefull. I'm stage 2.
Honest Bob is offline   Reply With Quote
Old 10-23-2006, 02:44 PM   #7
DocWyte
Scooby Newbie
 
Member#: 1840
Join Date: Jul 2000
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2002 M3
Oxford Green

Default

I usually get around 310 on my STI before the gas light comes on, then I have about another 3 gallons left. I average around 24mpg in it, it's bone stock...
DocWyte is offline   Reply With Quote
Old 10-23-2006, 04:04 PM   #8
rallysquirrel
Scooby Specialist
 
Member#: 7006
Join Date: May 2001
Chapter/Region: NESIC
Location: Clifton Park, NY
Vehicle:
2007 SpecB

Default

Quote:
Originally Posted by Honest Bob View Post
I can consistently get at least 300mpg, sometimes 320 if I'm extra carefull. I'm stage 2.
<I'm gonna be a butthole>
Wow, you've got one of those super hybrid vehicles
rallysquirrel is offline   Reply With Quote
Old 10-23-2006, 04:23 PM   #9
02redwagone
Scooby Specialist
 
Member#: 87067
Join Date: May 2005
Chapter/Region: AKIC
Location: Oregon Coast/AK
Vehicle:
02 Old but tasty
SRP

Default

Hmm... Got my first (in a year and a half) 300+ mile tank after recently getting my PDX maps.
02redwagone is offline   Reply With Quote
Old 10-23-2006, 04:33 PM   #10
ESmooth
Scooby Specialist
 
Member#: 118082
Join Date: Jun 2006
Chapter/Region: SCIC
Location: STOPTECH
Default

lol, im lucky to get 220 miles out of a tank
ESmooth is offline   Reply With Quote
Old 10-23-2006, 06:03 PM   #11
smac
Scooby Newbie
 
Member#: 119196
Join Date: Jul 2006
Default

Quote:
Originally Posted by AllAWD View Post
I doesn't seem like you are that far off from me depending on how many gallons a full tank is. I'm running a stage 2 and usually fill up 12 gal at about 300mi. I have been getting 25 mpg, with more highway than city. I tried for a couple tanks to conserve (BTW, the econo map got me worse mileage) but it didn't really help 26 mpg versus 25 mpg.

Also I'm approaching 60k, so hopefully new fluids, plugs and filter will help some.
Exactly what I want to do is lean it out with a pro tune cause everyone knows that Cobb runs pretty rich to be safe. Would it not be heaven times 1,000,000 if we all could run stage 2 and have about 300hp at the wheels and still get 30mpg when we dont ride hard. Speaking of hard, I need to blow off some steem just thinking about that.....

I am very proud of that thought, therefore it gets 2 nana's and 3 smackin it's.....
smac is offline   Reply With Quote
Old 10-24-2006, 03:28 AM   #12
Scoobypup
Scooby Newbie
 
Member#: 17148
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: Rapid City, SD
Vehicle:
2004 WRX Sedan
Aspen White

Default

Put some air in your tires. I go 5psi above what is suggested and I get a buttload better mileage than when set at factory spec. Plus 5psi isn't enough to mess with tread wear either. At least I haven't noticed any issues.
Scoobypup is offline   Reply With Quote
Old 10-24-2006, 03:47 AM   #13
sluflyer06
Scooby Specialist
 
Member#: 111641
Join Date: Apr 2006
Chapter/Region: MWSOC
Location: St. Louis, MO
Vehicle:
2020 CWP STi
RIP - 06' WRX w/ 6spd

Default

thats horrible???? you must cruise control at 30mph to work and back to even get that much, have some fun already.

I get 22mpg if i never break 3K in any gear with mixed city and highway.

Normal non crazy driving is about 19mpg, less on winter gas. 27mpg 80mph cruise control highway only.

note: this is on stage 2 map, MPG was lower on stock ecu.
sluflyer06 is offline   Reply With Quote
Old 10-24-2006, 12:08 PM   #14
carrman
Scooby Specialist
 
Member#: 69137
Join Date: Aug 2004
Chapter/Region: NWIC
Location: Medford, OR
Vehicle:
2007 2.5i Outback
1966 Chrysler 300

Default

I usually get about 19 around town, and about 24-25 on freeway climbing the mountain passes between Medford and Eugene, OR, and from Medford to Mt. Shasta, CA. That's doing 70 the whole way. I have seen 30 on flat freeway trips, and 34(!) running from Klamath Falls to Bend to Medford. That's only going about 60 mph for that trip. Cobb stage 2 w/up-pipe, and TBE.
carrman is offline   Reply With Quote
Old 10-24-2006, 12:16 PM   #15
4wdwrx
Scooby Specialist
 
Member#: 72042
Join Date: Oct 2004
Chapter/Region: South East
Location: Sunshine
Vehicle:
2002 V7 Impreza WRX
The Blue Mammoth

Default

check your tire pressure. when I got my stage 2, I was getting worst mileage than stage 1, which had better mileage than stock. I went to pump some air one day and it was at 30 psi. pumped it back up and got great mileage again.
4wdwrx is offline   Reply With Quote
Old 10-24-2006, 12:25 PM   #16
ekw
Scooby Specialist
 
Member#: 92141
Join Date: Jul 2005
Chapter/Region: Tri-State
Location: in a guardrail near you
Vehicle:
2014 GT-NC-PRHT
Zeal Red.

Default

if you fill out your profile, we'll know what you're driving . . .
which would at least add a data point to the guessing game.


also, what is your actual computed mpg?
ekw is offline   Reply With Quote
Old 10-24-2006, 12:43 PM   #17
smac
Scooby Newbie
 
Member#: 119196
Join Date: Jul 2006
Default

Quote:
Originally Posted by ekw View Post
if you fill out your profile, we'll know what you're driving . . .
which would at least add a data point to the guessing game.


also, what is your actual computed mpg?
Great point. We'll start with this till I complete the profile. Sorry about that, I have posted my mods on other posts on this forum but should have listed it again for this question as well. Here it is....


06 WRB STI
Silencer removal (still have the plastic ram air duct)
K&N drop in filter
3" Apexi N1 Full TBE
Cobb Access port running stage 2 map
ICE
Greddy Auto timer & Greddy EBC (just another digital boost controller)
Defi Turbo, Oil pressure and EGT with Defi pod.
Clarion 7" roll out DVD player
2 Kicker 12's in the trunk for boom boom
All other speakers are stock for now
Fined tuned by none other than myself (been installing and tuning since 1993)
smac is offline   Reply With Quote
Old 10-24-2006, 03:38 PM   #18
aznmc16
Scooby Newbie
 
Member#: 25253
Join Date: Sep 2002
Location: So Cal 626
Vehicle:
2004 WRX STi
Aspen White

Default

my gas light turns on at 180 miles on the odo.

stage1. I drive my car everyday like i stole it. :P
aznmc16 is offline   Reply With Quote
Old 10-25-2006, 03:20 PM   #19
Humboldt wagon
Scooby Newbie
 
Member#: 100391
Join Date: Nov 2005
Location: Humboldt, CA...
Vehicle:
2004 WRX sportwagon
chipped and dented white

Default

I'll trade you my stock equipment for your stage two parts. That way I can have more fun and you can get better gas mileage.
Just kidding, paying for gas sucks when you like driving for entertainment value.
Humboldt wagon is offline   Reply With Quote
Old 10-27-2006, 05:11 PM   #20
rjacobs
Scooby Specialist
 
Member#: 80127
Join Date: Jan 2005
Chapter/Region: TXIC
Default

300 in an STI is pretty damn good, I have been getting about 250 stock. On a recent almost 1000 mile drive I got around 340 all highway at 80 mph. I probably could have gotten alot better at 65 or 70, but who wants to drive 1000 miles at 65 mph.
rjacobs is offline   Reply With Quote
Old 10-27-2006, 10:33 PM   #21
ADR 04STi
Scooby Specialist
 
Member#: 51918
Join Date: Jan 2004
Location: UpState,NY
Vehicle:
2015 Audi S3
Daytona Gray

Impreza WRX STi

keep your foot out of it

Everyone complains about not having enough power, yet when you get more power, now you complain about lower gas milege. You can always revert to stock.

Want to play, you gotta pay
ADR 04STi is offline   Reply With Quote
Old 10-28-2006, 12:27 PM   #22
Uncle Scotty
*** Banned ***
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK buy Nates beans
westcoastroasting.com

Default

....~19-21mpg in town and ~24-25 on tha road at speed
Uncle Scotty is offline   Reply With Quote
Old 10-28-2006, 06:40 PM   #23
AlxSti
Scooby Guru
 
Member#: 94615
Join Date: Aug 2005
Chapter/Region: MAIC
Location: Wilmington, DE
Vehicle:
2017 VW GTI S1+
2006 STi 341WHP/356TQ

Default

300 to a tank is great! thats what i get in my '04 stage 2 sti when being nice!
AlxSti is offline   Reply With Quote
Old 10-28-2006, 07:16 PM   #24
DocWyte
Scooby Newbie
 
Member#: 1840
Join Date: Jul 2000
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2002 M3
Oxford Green

Default

I routinely get 300 miles before the gas light comes on. If I ran the tank dry I'd probably get 360-375 miles out of a tank on my '06 STI. Right now it's bone stock...
DocWyte is offline   Reply With Quote
Old 10-28-2006, 10:06 PM   #25
aznmc16
Scooby Newbie
 
Member#: 25253
Join Date: Sep 2002
Location: So Cal 626
Vehicle:
2004 WRX STi
Aspen White

Default

all u guys gettin 300+ miles must live in the boonies.

i live in traffic congested city of los angeles. always stop and go.
i'd be VERY lucky hit 220 before my gas light turns on.
aznmc16 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
I want to go Cobb stage 2... but I want to keep my oem STI axle back! 06STIGO13 Newbies & FAQs 38 12-04-2007 08:50 PM
Cobb stage 2 on my 2006 Wagon.. but can't drive my car... jay25RS Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo) 31 05-18-2006 09:56 AM
going cobb stage 2...but still have stock midpipe on. SubNoob Engine Management & Tuning 6 01-21-2006 07:01 PM
going cobb stage 2 but dont want egt gauge? RobSub Engine Management & Tuning 15 11-08-2005 03:54 PM
Holy Hell My Gas Mileage Sucks! Gecko2k2 Legacy Forum 8 04-09-2004 09:50 AM

All times are GMT -4. The time now is 12:43 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.