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Old 04-26-2002, 01:20 AM   #1
Scooby Specialist
Member#: 7087
Join Date: May 2001
Location: Houston, TX
2002 2.5RS

Thumbs up How's the mpg on modded cars?

I'm curious on the mpg you guys are getting after modding your cars. Please list your mods and mpg.

Also, Which mods will help or kill your mpg?
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Old 04-26-2002, 03:29 AM   #2
Scooby Specialist
Member#: 15409
Join Date: Feb 2002
Location: Lakewood, CO

Only power mod I have is Ganzflow CAI, and it stayed about the same: 19-22 mpg, mostly city. It may have gotten slightly better, but I use the gas a little more now . I will be adding header, catback, pulleys and ProECM soon, so we'll see how that does.

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Old 04-26-2002, 06:42 AM   #3
Scooby Newbie
Member#: 3409
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Oly
98 My FMIC
Is bigger than yours.


19-22? Ouch.

I only get that bad when I practice my 60-110-60 runs for an hour and a half.

Otherwise I get 24 city/mixed and 28ish highway

Cobb CAI, UOR UDP, SPT/Brospeed cat back, dunlop sport 5000s, mobil 1 engine/rear diff (and currently tranny but that's getting removed tomorrow), NGK plugs, maybe some other things I'm not remembering now. Kartboy shifter/bushing, sti top/motor/tranny mounts, v5 struts, SPT springs, FHI 18mm rear swaybar, Cusco 40mm rear strut bar.
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Old 04-26-2002, 10:09 AM   #4
Scooby Specialist
Member#: 2817
Join Date: Nov 2000
Location: NYC and Troy, NY
2001 Impreza 2.5RS


I get 26 mixed and 29-31 highway right now.

GanzFlow, Stromung, SAFC, Magnacore Wires & Bosch Platinum Plugs, KYB AGX, Whiteline rear sway bar, strut bars, v5 wing, new stock tires on WRX rims, front and rear skidplates, Valvoline synthetic tranny/diff oil, and regular 5w-30 engine oil.
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Old 04-26-2002, 12:04 PM   #5
Scooby Specialist
Member#: 1997
Join Date: Jul 2000
Chapter/Region: MWSOC
Location: Des Plaines, IL
2006 Acura TL 6spd
STMGM6 alumni


Well, when I was stock I got 21-22 stock

Now I have Intake, UDP, 2.25" catback and street cams for power mods. Still get 21-22.

Getting heads and high overlap cams is apparently when you start to lose MPG.
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Old 04-26-2002, 12:30 PM   #6
Scooby Guru
Member#: 114
Join Date: Jul 1999
Chapter/Region: MWSOC
Location: Wichita, KS and Whoring, OT
'03 Evo, Rice White
'01 Erion CBR 929


my mileage and mods were just like Midwayman's until recently when I've become a more docile driver, not often visiting redline.

now I'm getting 24mpg mixed, but mostly highway.
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Old 04-26-2002, 01:40 PM   #7
Scooby Specialist
Member#: 5848
Join Date: Apr 2001
Location: burlington, vermont
1992 vw corrado vr6
silver w/ schrick/quaife



i bet your SAFC is helping you out a bit in MPG department, eh?

i've been wanting to get one, but i need dyno time to tune it as well.

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Old 04-28-2002, 02:50 AM   #8
Patrick L
Scooby Specialist
Member#: 634
Join Date: Dec 1999
Chapter/Region: TXIC
Location: Tulsa, OK
2000 Impreza 2.5RS
Becasue ITS racecar


I have been getting about 31mpg on the highwa.
I have a custom 3" intake, 2.25" catback and UR under drive pulley. Mobil 1 syn in the engine and RedLine shockproof in the tranny and rear diff.

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