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Old 11-26-2002, 07:44 PM   #1
fukamoto
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Quote:
Originally posted by Benjamin Tang
92. ross at technik said there was a noticable difference on the dyno using 94... but the only difference i could feel was in my wallet
LoL!

I fill up using 87. Gas is expensive enough.

Derek
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Old 11-26-2002, 08:07 PM   #2
bakchoi
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Default what gas octane do u guys fill for ur car??

in the owner's manual it says fill at 87 octane.
but ppl. told me to fill it at higher octanes its better for the car!
so just wondering what octane do u guys fill for ur impreza
i fill it at 89 octane
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Old 11-26-2002, 08:24 PM   #3
youthanasia
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87 Octane. Our engines are made for it. On the contrary, higher octanes are harder to combust.
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Old 11-26-2002, 08:57 PM   #4
Avenger
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I'm using Cheveron 94 octane or my engine might blow.
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Old 11-26-2002, 09:05 PM   #5
SSR
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I'm using 94
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Old 11-26-2002, 09:09 PM   #6
Reckon
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USE THE SEARCH FUNCTION

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89.
any higher is definately overkill
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Old 11-26-2002, 09:50 PM   #7
jackwei
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87...
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Old 11-26-2002, 10:11 PM   #8
Benjamin Tang
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92. ross at technik said there was a noticable difference on the dyno using 94... but the only difference i could feel was in my wallet
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Old 11-26-2002, 10:37 PM   #9
Orbiter
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I use 92 for street where I run low boost and C16 race gas for track use =|
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Old 11-26-2002, 11:16 PM   #10
bakchoi
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Quote:
Originally posted by Benjamin Tang
92. ross at technik said there was a noticable difference on the dyno using 94... but the only difference i could feel was in my wallet

haha
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Old 11-27-2002, 01:46 AM   #11
Koyo
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I fill 89 in my sister's RS and 92 in my 91' Previa.
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Old 11-27-2002, 02:01 AM   #12
Ooter
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87 for me.
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Old 11-27-2002, 02:13 AM   #13
YaoShi
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89, it seems to eat it slower. i don't know

-YaoShi
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Old 11-27-2002, 02:14 AM   #14
imprezton
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87. 91 seems to be eaten slower, but not at a rate sufficient to pay the rapists for it.
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Old 11-27-2002, 02:16 AM   #15
Parousia
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Check out this article

Gasoline and Octane ratings

It is 90% of the time totally a waste of money.

Parousia.
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Old 11-27-2002, 02:20 AM   #16
Benjamin Tang
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would like to hear from other wrx owners... i only run chevron. i tried going down to 89 but i felt a very noticable loss in power. i can't feel any difference between 92 and 94 so i'm stuck at 92 until further notice
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Old 11-27-2002, 10:57 AM   #17
RaceFace
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There was a good article about this in Car & Driver about a year ago. Their conclusion was that it was best to follow the directions in the owners manual as the car is set up to run on a specific octane. For a Subaru with the 2.5 it is most definitely overkill to run anything over 90 - but for any car with a turbo (they used a Saab in the test) it is most advantageous to use a higher octane such as a 92 or 94. C&D said that by going with a lesser octane, the amount you save (say 10%) would be equal to the amount of horsepower that you would lose.
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Old 11-27-2002, 12:59 PM   #18
sandy lam
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I thought this was discussed before.... anywayz...
i am using 94...... many people use something below and it's fine.. but from what I experiences you car actually "learns"... once I used 94 at the beginning for a while.... if I lower it to 92 or even 89 I would notice the differences--the car doesn't want to "go". And I know people use 87 for their car, and if they fill in 94 once a while the car seems to be more aggressive.
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Old 11-27-2002, 12:59 PM   #19
Wrx31
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Quote:
Originally posted by Orbiter
I use 92 for street where I run low boost and C16 race gas for track use =|
Where do you get the race gas from? Not like I am going to use it, but just wondering...
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Old 11-27-2002, 01:42 PM   #20
YaoShi
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Quote:
Originally posted by sandy lam
I thought this was discussed before.... anywayz...
i am using 94...... many people use something below and it's fine.. but from what I experiences you car actually "learns"... once I used 94 at the beginning for a while.... if I lower it to 92 or even 89 I would notice the differences--the car doesn't want to "go". And I know people use 87 for their car, and if they fill in 94 once a while the car seems to be more aggressive.
happend to my car, i was using 87 in the begining, but now after i started using 89, it doesn't "go" with 87 anymore Oh well.

-YaoShi
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Old 11-27-2002, 06:09 PM   #21
steve
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nothing less then 94 in my integra, since detonation is not my friend. As for the WRX, it sips on nothing less than 91 octane.

As far as some chemist, or even worse, some dumbass commuter** trying to prove to me that any more than 89 is a waste, all I have to say is come for a ride with me when I'm running 89 vs 94 and try to tell me that there's no difference in performance. Then we'll tear out my plugs, and I'll be happy to show you what happens when you don't run the proper gas in a high performance vehicle.

that is all.


** = Anne Helmenstine, Ph.D., is a stay-at-home-mom with a broad scientific and medical background. She loves online chatting and surfing the internet...if the topic is science, so much the better! - gimme a break
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Old 11-27-2002, 06:30 PM   #22
AllWheelDrift
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Use what your car was designed for. Some cars state both a minimum and recommened octane. You should always run at leat the minimum, and recommened is probably required for full power. Also, as a car gets older, carbon buildup etc can make it more prone to detonation, in which case it will be happier on higher octane fuel. Furthermore, if you've go mods that increase the effective compression (ie. are running more boost or higher compression pistons) or have advanced the timing, use higher octane.
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Old 11-27-2002, 07:31 PM   #23
Sperm
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with under 6000 miles!

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I spring for the 94 if it's available, but nothing less than super(93). I can definately tell the difference between 91 and 94. Also I understand that our stock ECU will adapt a wide variety of parameters depending on what it is given, so I'm gonna give it the best fuel to work with. I'm already trying to force as much air as possible in there. Shouldn't slack on the gas. High octane is a MUST if you're running anything other than stock boost so as to limit the chances of detonation and engine damage.

anybody that hasn't already needs to check this site out:

www.spdusa.com
Read it all.
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Old 11-27-2002, 08:35 PM   #24
Orbiter
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you can get race gas from VP fuels at mission. they are usually there at street legals and test n tune days.
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Old 11-27-2002, 08:53 PM   #25
Koyo
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Chevon gas have cleaning agents in it already so I don't think carbon deposit would be a problem. As long as you do proper maintainance, it should be fine.
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