car tune for 91 octane , can I run none ethanol 90 octane ?

BADBOYSVT

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i figure running none ethanol help fighting my bad gas issue, since I dont drive it often. I found a gas station down the street carry none ethanol, but only 90 octane and 87 octane . I wonder if it ok. I do drive hard when I have a chance, I dont want lower fuel octane then what I was tune for. thanks guys
 

roy_1031

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I’d imagine octane is octane. 90 to 91 shouldn’t be much of a difference whether it has ethanol or not. Do you have a wide band installed? Monitor that and go from there.


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Bdubbs

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I imagine it's fine. How often has anyone tested 91-93 to make sure that's what it is?

My tune was for 92 octane, but I now put in the 91 non oxygenated fuel. Although I don't get into boost, unless I'm on the corn.

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