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#1
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Gas Mileage Improvement after New Cat, O2 Sensors & V4 Chips
Two weeks ago, I replaced my stock main cat with a Magnaflow dual inlet single outlet cat. The stock exhaust (pre-cat pipes) had a bunch of cracks at the brackets that bolt to the tranny that I welded up while everything was apart. That same day, I replaced my original O2 sensors with new Walker ones and installed my ECUtune Stage 1 V4 chips.
From the first tank after doing all three things, my gas mileage has improved a consistant 12%. My average mileage before the mods was a solid 22MPG (+/- .5 MPG). Since the install, my last four tankfulls netted 25 MPG (+/- .5 MPG). My commute is 80% highway (cruise set at 80MPH), 20% city (leadfooting it to hear the Stebro). I'm not sure to which mod I should attribute the gains. More than likely, it was a combination of all three. Has anyone else seen improvement s in mileage from doing any one (or combination) of these mods/repairs? The V4 chip benefitting mileage is suspect as it actually makes you want to bury your foot in it more, not less. I average 30,000 miles a year. At $2.00 a gallon of 93 octane premium, my increased gas mileage will save me $327 a year. The cost breakdown: Magnaflow Cat: $64.00 delivered V.4 Chip Upgrade: $59.00 delivered New Walker O2 sensors: $128 delivered Total parts cost me $251. It's not to often a mod/repair pays for itself. Last edited by gsodonis; 11-05-2004 at 07:49 PM. |
#2
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I replaced my main cat with a rebult one from napa and my MPG went up to. I guese after 100,000 miles the cat starts to get blocked up.
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2005 Legacy GT 2002 WRX VF22, Pinks, big TMIC and turbo back 128,*** miles My WRX's Cardomain Page |
#3
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From what I've heard from other members, new O2 sensors can give a huge improvement in gas mileage. What's amazing is that your mileage has improved that much while having the additional hp from the maganflow high-flow y-cat and V.4 chip update.
-Chike
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"Wise men talk because they have something to say; fools, because they have to say something." - Plato 2013 Cosmic Blue 5spd Evo X GSR 2006 Galaxy Gray 6MT RX-8 (sold) 2006 Steel Gray WRX TR (sold) 1996 Brilliant Red SVX L (sold) |
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