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> gas, different octanes....
post May 12, 2004 - 11:25 PM
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celicarocker

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i put 87 octane in my car.... what will i get from switching it to 93? besides about $3 more smile.gif


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post May 13, 2004 - 12:19 AM
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kdash

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alot more trust me you'll feel it right away...you should try putting 110 octane i did that once and my car stays near red line everytime i pound on it. plus it's always better to put higher octane cause it cleans out your motor.
post May 13, 2004 - 2:11 AM
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kuya1284



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QUOTE (kdash @ May 12, 2004 - 10:19 PM)
alot more trust me you'll feel it right away...you should try putting 110 octane i did that once and my car stays near red line everytime i pound on it.  plus it's always better to put higher octane cause it cleans out your motor.

I guess I'll be the first to jump in and clear up this MISNOMER... AGAIN...

The only thing HIGHER OCTANE will do is retard detonation... It will NOT improve gas mileage, nor will it clean out your motor. As a matter of FACT, the EPA requires "that all octane grades of all brands of gasoline contain engine cleaning detergent additives to protect against the build-up of harmful levels of engine deposits." The 7A and 5S were designed to run on 87. Unless your motor is pinging and knocking, it's absolutely useless to waste money on higher octane.

This post has been edited by kuya1284: May 13, 2004 - 2:16 AM
post May 13, 2004 - 7:17 AM
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abatardi

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110 octane? PLEASE. That's not even unleaded I bet. You're killing your engine buddy.

I'm with Kuya... higher octane fuel is actually just harder to ignite...hence why people use water injection as an "octane booster" to prevent detonation.

Putting 91 or 93 in your 4 cylinder engine that was designed to run on 87 will do nothing for you except hurt your wallet.

- abatardi, bored and sitting in the airport in Newark F@#$ing, NJ... Did you know that celica.net is "banned for content" from airport internet terminals? Learn something every day.
post May 13, 2004 - 7:24 AM
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CelicaQT



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QUOTE (abatardi @ May 13, 2004 - 8:17 AM)
- abatardi, bored and sitting in the airport in Newark F@#$ing, NJ... Did you know that celica.net is "banned for content" from airport internet terminals? Learn something every day.

Hmmm that's weird...but why?

Oh and I agree with you guys also. It's useless to get higher octane if your car calls for a lower grade. Just hurting your wallet like they've said.

If it calls for unleaded...stick to unleaded. smile.gif
post May 13, 2004 - 10:19 AM
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celicarocker

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ok, didnt know


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post May 13, 2004 - 11:56 AM
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In the UK normal unleaded fuel is about 95 RON with 'super' fuels offering 97-99 RON. I always use a higher RON fuel as there is a small but noticeable difference in engine performance. I don't know if the car really accelerates faster or has higher torque but it certainly feels smoother.

Some info about higher octane fuels in the UK (Shell Optimax, BP Ultimate etc):

"Designed to clean your engine as you drive. It helps remove deposits on inlet valves and ensure fuel injector nozzles are kept in tip-top condition. This is one of the reasons it can begin to improve your vehicle’s responsiveness from the moment you use it."

"Can be mixed with all unleaded gasolines, but you’ll only reach its full potential if you use it all the time."

"It is well known that lack of deposits improves the efficiency of the engine, so using it should help fuel economy when compared to regular unleaded fuels."

However it does cost about 6 pence per litre more (about $0.40 / gallon).

post May 13, 2004 - 12:12 PM
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Supersprynt



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We used a diferent calculation to determine octane. Its like RM/2 or something i really dont rememer. If u look on ur gas pump it'll tell you. Thats why theres such a big difference in continents in gas. Japan gas does have higher octanes however its not as high as everyone thinks. I'm stuck using 93 which is now the highest (Sunoco dropped 94 frown.gif) cuz of the way my engine and ecu is setup.

Eco engines get eco gas.


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post May 13, 2004 - 12:25 PM
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Chrobis



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Actually kuya and everyone else the 5s is actually recomended to run 91 octain rolleyes.gif The owners manual says it. But, it said it is ok to run 87, better to run 91 or something like that. Should you? probably not wink.gif

Sprynt you think your unlucky with your gas, CA only offers up to 91 octain!
post May 13, 2004 - 12:26 PM
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Supersprynt



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Just sucks cuz its like 2.30 a gallon for 93.

Back 20 yrs ago u could get 100 outta the pump.


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post May 13, 2004 - 6:04 PM
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u can still get 115 on the pump here. i ran it a while back and couldnt believe how much of a difference it made. and please dont chime in saying it makes no difference bacause it did. i dont know the mechanics of how it makes a difference but i could definitely tell that my rpms were jumping faster. and the best part is the sweet sweet smell smile.gif
post May 13, 2004 - 6:17 PM
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Coomer



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QUOTE (Supersprynt @ May 13, 2004 - 10:12 AM)
We used a diferent calculation to determine octane. Its like RM/2 or something i really dont rememer. If u look on ur gas pump it'll tell you. Thats why theres such a big difference in continents in gas. Japan gas does have higher octanes however its not as high as everyone thinks. I'm stuck using 93 which is now the highest (Sunoco dropped 94 frown.gif) cuz of the way my engine and ecu is setup.

Eco engines get eco gas.

So if my engine runs on 100 octane gas in Japan, do you know the equivalent in US octane? I always put 92 in my car now, and when I put octane booster in my tank, the car does run noticably smoother and seems to idle better, but it doesn't feel any faster.


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post May 13, 2004 - 7:48 PM
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BlackSTX



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Hey, drive up in the mountains in West Virginia sometime and you'll see 85 or 86 Octane. Something like that, it's been a while, but it tripped me out when I saw it.
post May 13, 2004 - 8:03 PM
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celicarocker

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i have a stock (engine wise) 95 ST.... 142k....

will i gain anything from putting a higher octane gas in my car? people have conflicting views on this....


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post May 13, 2004 - 8:45 PM
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jgreening

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No you wont, but it only costs a tank of gas to find out for yourself. Try it. Then you won't have to take our word for it.


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QUOTE(lagos @ Jul 10, 2006 - 1:55 PM) [snapback]454118[/snapback]

i know your trying to do the right thing for your motor, but this is one of those times where you should just trust the guys who have had their swaps for a while and have done a ton of research into this.
post May 13, 2004 - 8:48 PM
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celicarocker

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QUOTE (jgreening @ May 13, 2004 - 9:45 PM)
No you wont, but it only costs a tank of gas to find out for yourself. Try it. Then you won't have to take our word for it.

true dat...


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post May 13, 2004 - 10:09 PM
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QUOTE (abatardi @ May 13, 2004 - 8:17 AM)
110 octane? PLEASE. That's not even unleaded I bet. You're killing your engine buddy.

Two small points I feel required to make:

1: Unleaded is offered up to 104(buyracegas.com has Sunoco 104 Unleaded, and 116 Leaded)
2: Leaded fuel will kill the catalytic convertor, not the engine(the emissions it puts out will destroy the catalyst in the cat, causing the engine to perform badly... See http://www.chm.bris.ac.uk/motm/leadtet/leadh.htm for details)

Anyways, I have found that running 93 makes for much smoother idle. And allows me to increase my timing a lot(currently ~12 degrees), without destroying the engine(been running fine for over 50k(201k now).
post May 13, 2004 - 10:29 PM
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JWalk1818



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WELL PIN A OSE ON EVERYONES NOSE LOL! Im running 93 all the time at 208 a gallon and i have too cause of the turbo 89 knocks and 87 would kill me at 10 psi but dang 104 or 110 would be sweet maybe help me hit 9.4 in the 1/8th i ran a 9.57 tonight. SO YES 93 HELPS WINK. LOL IM JSUT DRUNK AND BEING A BUTT LOL!


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post May 13, 2004 - 10:50 PM
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Chrobis



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Super once again... CA only has 91, and $2.30 would be a bargain. I pay close to $2.50 for just 91
post May 13, 2004 - 11:32 PM
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Hanyo

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QUOTE (aaronc222 @ May 14, 2004 - 3:09 AM)
Anyways, I have found that running 93 makes for much smoother idle. And allows me to increase my timing a lot(currently ~12 degrees), without destroying the engine(been running fine for over 50k(201k now).

what does advancing your timing do for a N/A car?

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