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100 Octane?, mileage, performance, stations? o_O

 
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Old 10-28-2008, 01:16 AM
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100 Octane?, mileage, performance, stations? o_O

So I've been reading all the threads on here about running high octane gas for those picky H22s. I have an H22 in my prelude and only run 91 octane (california doesnt have 93 or 94 octane usually), but I never knew there was a difference from gas station to gas station.

So here are my questions:
1. What gas station is the "best", why? why? why?
2. Theres a high performance gas station near my house that sells straight up 100 octane, its like 6 dollars a gallon and really not something I'm planning on using on a regular basis, but what would happen if I used 100 octane? Boom!?
3. What kinda mileage improvements, if any, will I see between different octane ratings?

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Old 10-28-2008, 01:24 AM
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Re: 100 Octane?, mileage, performance, stations? o_O

Shell is just about the best you can get. They add a stuff to it that helps keep the engine clean, like you see in the shell ads. BP would be my next choice they add some things too. Idk how it is out thear but the ever shell hear uses 10% ethanol blend crap so i use the BP b/c i get a lot less MPG with the blend the straight gas.
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Old 11-01-2008, 04:39 PM
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Re: 100 Octane?, mileage, performance, stations? o_O

basically what yogi said man, my dad told me it's been the same since the 70's with Shell being the best gas, next to the more recent BP company. I always use 93 Octane in my car, it's what the "ultimate" or "premium" is in my state (Illinois). However I haven't seen anything higher than 93 in my few years of driving, there might be higher tho. but definitely run premium. 91 will do just fine im sure.
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Old 11-01-2008, 05:28 PM
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Re: 100 Octane?, mileage, performance, stations? o_O

i doubt running 100 octane will make your engine go boom. i tink it'll make it run better. but when you look at the price factor, 91 is fine. lol
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Old 11-01-2008, 09:38 PM
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Re: 100 Octane?, mileage, performance, stations? o_O

It would be alright to run 100 octane. If you researched, you would find out that the USDM engines are tuned from the factory to run on lower octane gas. The gas in Japan is "on average" 10 octane higher than it is in the US. They are the same engines, just tuned differently. 100 Octane will work fine. :D
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Old 11-01-2008, 09:44 PM
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Re: 100 Octane?, mileage, performance, stations? o_O

Quote:
Originally Posted by darkstarvik View Post
So I've been reading all the threads on here about running high octane gas for those picky H22s. I have an H22 in my prelude and only run 91 octane (california doesnt have 93 or 94 octane usually), but I never knew there was a difference from gas station to gas station.

So here are my questions:
1. What gas station is the "best", why? why? why?
2. Theres a high performance gas station near my house that sells straight up 100 octane, its like 6 dollars a gallon and really not something I'm planning on using on a regular basis, but what would happen if I used 100 octane? Boom!?
3. What kinda mileage improvements, if any, will I see between different octane ratings?

The 100 octane, that's Rebel right? I know the Rebel stations in Vegas sold 100 octane for $5 a gal and that was in 06. I never put more than 5 gal and then finish filling up with 93 but tthat was just cause I was afraid I'd blow my engine
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Old 11-02-2008, 03:52 PM
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Re: 100 Octane?, mileage, performance, stations? o_O

if in japan they are tuned for higher octane gas, when you use a jdm p13 ecu does it affect it when you use even premium 93 here? cuz thats a big octane difference. would it have detonation like if we use 87 in ours?
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Old 11-03-2008, 12:37 AM
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Re: 100 Octane?, mileage, performance, stations? o_O

I'm actually not sure sir. Good question. Go ask Si Speed in his "Ask me anything" thread lol. I'm stumped.
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Old 11-03-2008, 12:43 AM
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Re: 100 Octane?, mileage, performance, stations? o_O

you wont gain anything.

If your car runs perfectly fine on premium 91, 92, or 93 octane no reason to put 100 octane in it.

The biggest reason to use a higher octane gas is to keep your engine from knocking. Real knocking is where your gas isnt a high enough octane and it starts to combust from the pressure of compression, instead of the spark of the spark plugs.

Usually motors that boosted retarded high require more than 93 octane (up to 116 race fuel) or motors where the compression ratio is higher than 12.0:1
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Old 11-03-2008, 02:10 AM
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Re: 100 Octane?, mileage, performance, stations? o_O

if it is not meant to run on that octane, you can actually lose power. The octane points represent its resistance to detonation. This means the higher octane fuels burn slower than one rated with a smaller number.

smaller number = faster burn rate
bigger number = slower burn rate
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