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Old 05-21-2013, 07:11 AM   #1
traildevil
 
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112 octane?

What would happen to my 2013 LS with the LFX motor if i stuck 112 octane race fuel in it? blow her up? or pep her up? lol
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Old 05-21-2013, 07:36 AM   #2
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Neither.
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Old 05-21-2013, 07:42 AM   #3
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You'd waste a lot of money.
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Old 05-21-2013, 07:43 AM   #4
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yup, no change. fuel will burn colder sure, but the ecm may mistake this as a cold engine and use more fuel
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Old 05-21-2013, 07:49 AM   #5
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You'd be wasting money.... You'll be ruining your cat....
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Old 05-21-2013, 08:40 AM   #6
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if I had a tune for it would it make any difference?
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Old 05-21-2013, 08:47 AM   #7
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Octane is a rating of the fuel's resistance to knock. Once you have enough octane to prevent knock, you gain nothing by adding more.
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Old 05-21-2013, 09:07 AM   #8
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Quote:
if I had a tune for it would it make any difference?
Would it make a difference? Yes.

Will it make a huge difference? Not on an otherwise stock engine. You'd be wasting money and killing your cats for barely any performance gain.
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Old 05-21-2013, 09:20 AM   #9
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You need to be tuned to properly run it and once you are you need to keep running it on that tune. Gigigantic waste of money for you. Probably cheaper in the end to buy a ZL1.

Sounds legit.
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Old 05-21-2013, 10:29 AM   #10
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Quote:
Originally Posted by Rocky1974 View Post
Octane is a rating of the fuel's resistance to knock. Once you have enough octane to prevent knock, you gain nothing by adding more.
^^^This^^^

A tuned N/A LFX will probably show no knock retard (KR) at all on 91-93 octane. Adding any more octane will give you no benefit. In fact, you would probably have to change your spark plugs to even run something like 112, and as others have said, kiss your cats goodbye.
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