# octane level/rating
**URL:** https://forums.speedlife.net/t/octane-level-rating/181199
**Category:** PittSpeed Automotive
**Created:** [March 24, 2006, 6:22am UTC](https://forums.speedlife.net/t/octane-level-rating/181199 "2006-03-24T06:22:18Z")
**Posts on this page:** 20
**Page:** 1
### Author:  [@Quik](https://forums.speedlife.net/u/Quik)
#### Post date: [March 24, 2006, 6:22am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/1 "2006-03-24T06:22:18Z")
so what octane do most of you run? is it pump gas or is it race gas? is it a mixture of both?
now if you run race gas is your car really a street car?
also if you ran race gas do you think you could actually get it to run on pump gas?
this would also define what is a street car and what isnt, adding octane at the track is ok but if you have to rely on it, it isnt a street car for the average wallet
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### Author:  [@Quik](https://forums.speedlife.net/u/Quik)
#### Post date: [March 24, 2006, 6:23am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/2 "2006-03-24T06:23:07Z")
i run 93 in all my rides, i have mixed it a few times for added safety when spraying
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### Author:  [@ZEX350Z](https://forums.speedlife.net/u/ZEX350Z)
#### Post date: [March 24, 2006, 6:28am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/3 "2006-03-24T06:28:45Z")
94 octane in the accord and M3. 87 in the beaters
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### Author:  [@burnyd](https://forums.speedlife.net/u/burnyd)
#### Post date: [March 24, 2006, 6:54am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/4 "2006-03-24T06:54:00Z")
93-94 in my celi… if I go any lower I notice a signicant drop is mpg. Before the motor swap I would put in the cheep stuff but I cant do that anymore.
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### Author:  [@BlkP42E](https://forums.speedlife.net/u/BlkP42E)
#### Post date: [March 24, 2006, 7:30am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/5 "2006-03-24T07:30:23Z")
93-94 in both of mine.
mix a little turbo blue in the mustang every so often
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### Author:  [@grindpunk16](https://forums.speedlife.net/u/grindpunk16)
#### Post date: [March 24, 2006, 7:31am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/6 "2006-03-24T07:31:48Z")
94 only
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### Author:  [@Quik](https://forums.speedlife.net/u/Quik)
#### Post date: [March 24, 2006, 7:33am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/7 "2006-03-24T07:33:04Z")
ok so far we have street cars posting up. i know there are ppl on here that have to run high octane
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### Author:  [@Jeff95TA](https://forums.speedlife.net/u/Jeff95TA)
#### Post date: [March 24, 2006, 8:22am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/8 "2006-03-24T08:22:18Z")
93, but might do 94 with the new engine because of the higher compression
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### Author:  [@whitey](https://forums.speedlife.net/u/whitey)
#### Post date: [March 24, 2006, 8:24am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/9 "2006-03-24T08:24:21Z")
93-94 in 240
89 in Jetta
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### Author:  [@KeithO](https://forums.speedlife.net/u/KeithO)
#### Post date: [March 24, 2006, 8:28am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/10 "2006-03-24T08:28:13Z")
The only reason that I can think of that you would need to run higher than street octane levels would be for high compression heads (and maybe with nitrous - I don’t know squat about nitrious). Octane is simply a numerical representation of a fuel’s resistance to pre-detonation. Fuel will spontaneously combustion at a specifc temperature or under sufficient pressure. The higher the octane level, the higher the resistance to combust before seeing a spark. Unless you are seeing high head temperatures or have a high compression ratio, race fuel is probably a waste of money. In fact, if you are putting higher octane fuel than recommended in your owner’s manual on a stock engine, you are likely also wasting your money, unless you know for a fact that the gas has additives to clean your fuel system.
Over the years, alot of people seem to be under the impression that octane is a measure of per-unit energy of the fuel. That’s just not true.
I run 93-94 octane in my road race car even though I could probably get away with 89 just because I know I am running at excessive high temperatures. I would prefer to complete avoid the kock sensor from retarding the timing on the track.
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### Author:  [@flyinglow57](https://forums.speedlife.net/u/flyinglow57)
#### Post date: [March 24, 2006, 8:34am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/11 "2006-03-24T08:34:32Z")
also boost levels would be a reason. i know when i was running 12lbs i would just use 93 but could def get away with 91 but whne i was running 20 lbs in the srt i always ran 93 but when i went to the track i tossed in a few gallons of 110.
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### Author:  [@yelo69](https://forums.speedlife.net/u/yelo69)
#### Post date: [March 24, 2006, 8:47am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/12 "2006-03-24T08:47:22Z")
I run straight aviation gas. At 13:1 it does a finejob.
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### Author:  [@KeithO](https://forums.speedlife.net/u/KeithO)
#### Post date: [March 24, 2006, 9:32am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/13 "2006-03-24T09:32:02Z")
> [@flyinglow57](#):
>
> also boost levels would be a reason. i know when i was running 12lbs i would just use 93 but could def get away with 91 but whne i was running 20 lbs in the srt i always ran 93 but when i went to the track i tossed in a few gallons of 110.
Good point. Didn’t think of that.
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### Author:  [@Converted2LSX](https://forums.speedlife.net/u/Converted2LSX)
#### Post date: [March 24, 2006, 9:35am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/14 "2006-03-24T09:35:14Z")
i ran turbo blue in the bike
87 in the beater
94 in the red car because of the compression
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### Author:  [@rmrider897](https://forums.speedlife.net/u/rmrider897)
#### Post date: [March 24, 2006, 9:45am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/15 "2006-03-24T09:45:41Z")
> [@RedLineGSR94](#):
>
> i ran turbo blue in the bike
>
> 87 in the beater
> 94 in the red car because of the compression
unleaded turbo blue in the practice bikes bike
VP Pro Racing Fuel in the race bikes
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### Author:  [@ssdragon](https://forums.speedlife.net/u/ssdragon)
#### Post date: [March 24, 2006, 9:56am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/16 "2006-03-24T09:56:02Z")
91-94 octane only here usually 93 cuz its common my owners manual says 91 minimum
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### Author:  [@Pewter](https://forums.speedlife.net/u/Pewter)
#### Post date: [March 24, 2006, 10:34am UTC](https://forums.speedlife.net/t/octane-level-rating/181199/17 "2006-03-24T10:34:20Z")
> [@yelo69](#):
>
> I run straight aviation gas. At 13:1 it does a finejob.
why,it dont fly:kekegay:
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### Author:  [@yelo69](https://forums.speedlife.net/u/yelo69)
#### Post date: [March 24, 2006, 12:20pm UTC](https://forums.speedlife.net/t/octane-level-rating/181199/18 "2006-03-24T12:20:16Z")
Neither do you, but you got wings on your back. :jerkit:
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### Author:  [@eurodad](https://forums.speedlife.net/u/eurodad)
#### Post date: [March 24, 2006, 1:09pm UTC](https://forums.speedlife.net/t/octane-level-rating/181199/19 "2006-03-24T13:09:34Z")
93 in the vw
87 in truck and trailblazer and mustang
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### Author:  [@6-b-kwik](https://forums.speedlife.net/u/6-b-kwik)
#### Post date: [March 24, 2006, 1:37pm UTC](https://forums.speedlife.net/t/octane-level-rating/181199/20 "2006-03-24T13:37:15Z")
run 110 in gn 26-30psi u need it…but im detuning car to 93 octane so i can drive more!!! it does get costly to drive with race gas all the time!! i might get alky for it not syre!!GTP runs 93
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