2.4L LE5 Performance Tech 16 valve 171 hp EcoTec with 163 lb-ft of torque

Octane question

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Old May 8, 2007 | 10:35 PM
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Octane question

Sorry if this is a repost.

My manual says the 2.4 SS also requires 91 octane fuel, like the 2.0.

Is this true? or necessary? or have i been puting exspensive gas in my car for no reason? I have zero engine mods.
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Old May 8, 2007 | 11:08 PM
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From: regina sask CANADA
thats a good question, i've been using 87 at co-op, tried the good stuff but didn't see an improvement
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Old May 8, 2007 | 11:21 PM
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its always best to use the recommended fuel. unless you're tuned for higher octane

Originally Posted by canuckSS
thats a good question, i've been using 87 at co-op, tried the good stuff but didn't see an improvement
use a fuel system cleaner, then fill it up with 93 octane. it should run more smoothly

Last edited by chevysalesman614; May 9, 2007 at 01:28 AM. Reason: Automerged Doublepost
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Old May 8, 2007 | 11:38 PM
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Ill ask the same question here that I do in all these threads.


If your willing to pay $x extra dollars every single month to buy the more "performance" oriented engine, with more HP, why would you want to cheap out $2 at the pump and treat your engine like a ***** that you dont want to cough up the cab fare for.

They suggest higher octane for the safety and longevity of your engine.
your not necessarily gonna "feel" anything....or notice changes in MPG.
but when your car is still pullin strong at 200k miles....what fuel you chose along the way will be part of that.
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Old May 8, 2007 | 11:50 PM
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I put 91 in regardless. It's a Starbucks Grande Mocha more for a full take of premium, why not go with it?
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Old May 8, 2007 | 11:56 PM
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I always use at least 93 octane in my 2.4l. You have to run a few tanks through to get all the bad 87 crap all the way out, (unless you completley drain your tank, then I guess two should do it)
I DO notice a difference than from the cheap stuff.

Another reason to do it is that the computer is timed to fire calculating that your using premium gas. When you put in the cheap stuff, the computer retards the firing to prevent knocking, and your performance will suffer.
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Old May 9, 2007 | 12:00 AM
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i run 93 only
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Old May 9, 2007 | 12:04 AM
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i have a 2.2 and i been putting in 89. i know i cud use 87 but i think it runs better on 89. just a personal preference. the extra 10 cents isn't gonna kill u. lol. here 87 is 3.01 and 89 is like 3.11 and 91 i think is 3.15 and 93 is 3.21. 20 cents is like 4 dollars difference since our tanks are only 11 gallons. ehh, idk i dont think its a big deal.

-ryan
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Old May 9, 2007 | 12:08 AM
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From: regina sask CANADA
Originally Posted by an0malous
Ill ask the same question here that I do in all these threads.


If your willing to pay $x extra dollars every single month to buy the more "performance" oriented engine, with more HP, why would you want to cheap out $2 at the pump and treat your engine like a ***** that you dont want to cough up the cab fare for.

They suggest higher octane for the safety and longevity of your engine.
your not necessarily gonna "feel" anything....or notice changes in MPG.
but when your car is still pullin strong at 200k miles....what fuel you chose along the way will be part of that.
i just got the car off a used lot, no manual. salesman said it wasn't the performance model. i fill the tank from almost empty every 2 days, it's my work vehicle. i put about 5k on a month, all city driving. i pay extra just cause it has 2 doors, insurance is cheap here, its about $145.00 a month for plates and insurance.
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Old May 9, 2007 | 12:16 AM
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im sure your engine will start knockin soon after using 87 gees. you should only buy 93 and up gas for the 2.4 and 2.0. i buy BP 93 or Sunoco has some really good 94 grade thats 3.35 a gallon woohoo . thats all.

ryan.
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Old May 9, 2007 | 01:08 AM
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From: regina sask CANADA
Originally Posted by rlinden86
im sure your engine will start knockin soon after using 87 gees. you should only buy 93 and up gas for the 2.4 and 2.0. i buy BP 93 or Sunoco has some really good 94 grade thats 3.35 a gallon woohoo . thats all.

ryan.
is that $3.35 a (us)gallon? the canadian gallon is 4.54 liters, each liter of 87 0ctane is around $1.10. th us gallon is only 3.78 liters, which would mean that u r paying about $1.12 for the good stuff, and i am paying 2 cents less for the crappy stuff(that's per liter). either i should have gotten sleep in the last few days, or canadian drivers r getting hosed hard!....could be the sleep thing thow.
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Old May 9, 2007 | 01:20 AM
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Originally Posted by canuckSS
is that $3.35 a (us)gallon? the canadian gallon is 4.54 liters, each liter of 87 0ctane is around $1.10. th us gallon is only 3.78 liters, which would mean that u r paying about $1.12 for the good stuff, and i am paying 2 cents less for the crappy stuff(that's per liter). either i should have gotten sleep in the last few days, or canadian drivers r getting hosed hard!....could be the sleep thing thow.

No dude, we get hosed. It's pretty stupid. 91 octane is going for $1.23/L in saskatoon right now, and it's projected to jump even higher very soon. AS in over $1.40/L

And money isn't the big thing. I was just wondering if a 171hp naturally aspirated 4 cylinder really required premium fuel.
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Old May 9, 2007 | 01:23 AM
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short answer?
yes.
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Old May 9, 2007 | 01:26 AM
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Thumbs down

Originally Posted by Dj_BuCa
And money isn't the big thing. I was just wondering if a 171hp naturally aspirated 4 cylinder really required premium fuel.
retard the timing to run 87 octane rice fuel
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Old May 9, 2007 | 01:29 AM
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From: regina sask CANADA
Originally Posted by Dj_BuCa
No dude, we get hosed. It's pretty stupid. 91 octane is going for $1.23/L in saskatoon right now, and it's projected to jump even higher very soon. AS in over $1.40/L

And money isn't the big thing. I was just wondering if a 171hp naturally aspirated 4 cylinder really required premium fuel.
what is dj_BuCa?
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Old May 9, 2007 | 01:31 AM
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Originally Posted by canuckSS
what is dj_BuCa?
MY DJ alias. I'm also a DJ.

The story behind the name is long, and i won't bore you with the details. It involves a lot of White Sambuca at a large event.
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Old May 9, 2007 | 01:36 AM
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if your name isn't mike, don't worry about that last question, or mixing it up with chris sheppard around 93, anyways, at 45 liters every 2 days, i can't afford the premium
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Old May 9, 2007 | 01:41 AM
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Not trying to be a dick....sometimes people take this comment the wrong way....
but if you cant afford the premium....it would have been a far smarter buy to get the LS.
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Old May 9, 2007 | 01:43 AM
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Originally Posted by an0malous
Not trying to be a dick....sometimes people take this comment the wrong way....
but if you cant afford the premium....it would have been a far smarter buy to get the LS.

no it's cool man. as i said, it's not the money. I can afford the premium. But thanks for everyones input.

Originally Posted by canuckSS
if your name isn't mike, don't worry about that last question, or mixing it up with chris sheppard around 93

ummm...ok?

Last edited by Dj_BuCa; May 9, 2007 at 01:43 AM. Reason: Automerged Doublepost
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Old May 9, 2007 | 01:57 AM
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no prob, i don't bruise easily, is the 2.2 that much different? i'm starting to think that sales guy is gonna be missin some chicklets.
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Old May 9, 2007 | 01:59 AM
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well its a good bit cheaper for one.
and the engine should do better mileage (2.2L)....and doesnt require premium fuel....

its a car really built for someone like yourself whos gonna put alot of miles on.
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Old May 9, 2007 | 02:30 AM
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From: regina sask CANADA
Originally Posted by Dj_BuCa
no it's cool man. as i said, it's not the money. I can afford the premium. But thanks for everyones input.




ummm...ok?
my bad, it was DJBucca. back in the 90's chris sheppard and bucca did some gigs together in hamilton Ont at club energy. sheppard ran with it, and that was the last i heard of bucca. the spelling didn't register at first.

Originally Posted by an0malous
well its a good bit cheaper for one.
and the engine should do better mileage (2.2L)....and doesnt require premium fuel....

its a car really built for someone like yourself whos gonna put alot of miles on.
it's all a write off, i should have did my homework, i'l try the higher octane, i like the car, i'm sure yours would be a blast. awesome ride.

Last edited by canuckSS; May 9, 2007 at 02:30 AM. Reason: Automerged Doublepost
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