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Old 10-23-2006, 02:52 PM   #1
smac
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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.
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Old 10-23-2006, 03:00 PM   #2
jmhubbard01
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2003 ...
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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?
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Old 10-23-2006, 03:01 PM   #3
Zsbaug24
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WR Blue Pearl

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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.
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Old 10-23-2006, 03:08 PM   #4
AllAWD
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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.
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Old 10-23-2006, 03:19 PM   #5
rallysquirrel
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I was usually getting 300 miles with my STOCK wrx. I say you're good.
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Old 10-23-2006, 03:26 PM   #6
Honest Bob
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I can consistently get at least 300mpg, sometimes 320 if I'm extra carefull. I'm stage 2.
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Old 10-23-2006, 03:44 PM   #7
DocWyte
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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...
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Old 10-23-2006, 05:04 PM   #8
rallysquirrel
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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
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Old 10-23-2006, 05:23 PM   #9
02redwagone
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Hmm... Got my first (in a year and a half) 300+ mile tank after recently getting my PDX maps.
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Old 10-23-2006, 05:33 PM   #10
ESmooth
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lol, im lucky to get 220 miles out of a tank
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Old 10-23-2006, 07:03 PM   #11
smac
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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.....
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Old 10-24-2006, 04:28 AM   #12
Scoobypup
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Aspen White

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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.
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Old 10-24-2006, 04:47 AM   #13
sluflyer06
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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.
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Old 10-24-2006, 01:08 PM   #14
carrman
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1966 Chrysler 300

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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.
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Old 10-24-2006, 01:16 PM   #15
4wdwrx
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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.
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Old 10-24-2006, 01:25 PM   #16
ekw
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Kartboy &Cobb-Jorge tuned

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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?
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Old 10-24-2006, 01:43 PM   #17
smac
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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)
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Old 10-24-2006, 04:38 PM   #18
aznmc16
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2004 WRX STi
Aspen White

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

stage1. I drive my car everyday like i stole it. :P
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Old 10-25-2006, 04:20 PM   #19
Humboldt wagon
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chipped and dented white

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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.
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Old 10-27-2006, 06:11 PM   #20
rjacobs
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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.
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Old 10-27-2006, 11:33 PM   #21
ADR 04STi
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2011 STI Sedan Wbody
Dk Gry Met:"BOOOSTI"

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
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Old 10-28-2006, 01:27 PM   #22
Uncle Scotty
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OK Houston
we have an Uncle

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....~19-21mpg in town and ~24-25 on tha road at speed
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Old 10-28-2006, 07:40 PM   #23
AlxSti
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www.AffinitiBrokerage.com

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300 to a tank is great! thats what i get in my '04 stage 2 sti when being nice!
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Old 10-28-2006, 08:16 PM   #24
DocWyte
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2002 M3
Oxford Green

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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...
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Old 10-28-2006, 11:06 PM   #25
aznmc16
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Aspen White

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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.
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