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hey guys,
I put a tanabe SRM cat back on my 01 vic, and a K&N FIPK II also and noticed that i get around 300 miles per 12 gallons of gas. When my car was stock, i ran 360-400 miles on 11 gallons only, did anyone else notice this difference? I drive in the same weather conditions everyday, and mostly drive freeway, and i live in San Diego, right next to the sea, can anyone tell me whats going on? I shift normal (3000-3500 rpm) and push my car only sometimes =)

 
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That sounds completely normal to me. If you've changed your wheels, that might affect it as well. If your driving habits have changed, that could account into it as well.

 
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i was getting around 360 every tank after i put on my 17s and K&N FIPK II, but after the damned exhaust, mileage just dropped like a bitch

 
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i do alot of freeway driving and i usually get a little under 450 miles on a full tank.

 
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shieeeeett! u got boltons??? how the hell u get that much? do u drive like under 70 on the freeway?

 
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The exhaust will do that. IMO, an exhaust isn't worth it unless you want to go to the gas station more often just to show off your muffler.

 
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do u think that allowing the engine to breath more will improve mileage? (header, and high flow cat)? cause the intake sucks in more air than stock, so maybe too much excess pressure builds up and results in bad combustion. i dunno...just contemplating.

 
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guys, think about what your doing. the basic bolt-ons, i/h/e, allow the engine to breathe better. Meaning, its sucking in moe air and pushing more air out easier right? more are into the combustion chamber means the ECU has to put more fuel into it as well. More fuel...and well, you get the point.

 
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how you guys get that much miles lolol
shift around 1500rpm?
damn boys
my gas mileage went down after i put intake on. yes its normal.
=/

 
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i've got aem intake and greddy exhaust. i always use cruise control set for 65-70mph and i shift at 3-3.5k. I also change my synthetic blend every 2k and check my tire pressure once a week. oh i also removed a lot of extra weight.

 
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thanks

 
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i get about 360 only when i drive hella crazy around town.

 
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Hey Horatio, that's about what I get, too. Just last week I got 460 miles on 12 gallons. I drive pretty much the same, I shift between 3000 and 4000 RPM, sometimes more, and I just have an SRI and a custom Magnaflow.

 
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Im completely stock.. except i got some integra ls wheels... which i think are lighter than stock steelies. last time i was trying to be conservative and save gas, and shifted about 2500 - 3000 rpm, i got about 38 mpg.. does anyone know about how much a CAI takes off?

 
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WTF!!!!!!! I never even got that much going stock!!!! how the **** do you ppl pull off that kinda mileage? I got 400 miles/12 gallons MAX!! EVER!!!Something wrong with my car? shoudl i take it in to the dealer or something?

 
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yeah for real ... my car sucks up gas ...

I drive with pushing down about 2-2.5 cm down on the gas ... shifting at 3k rpm ... I still only get about 320-330 mpg (before my gas light turns on) ...

mods are :

aem cai (apexi style filter), custom 2.25" catback, ground wire kit, 15" alloys ... that's it

 
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try resetting ECU...

 
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I got around 345 on a lot of hard driving once the light came on. I had about 2 gallons left in the tank once I filled it up so I could've went for quite a while.

 
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I know this is OT but your name in your sig banner is misspelled.

 
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By like 2lbs.... each.