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Old 03-05-2014, 07:22 PM
DRam14 DRam14 is offline
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I run 87. If your vehicle is designed for 87 octane and you use 89 or 91, then all you are doing is lowering your power and gas mileage. Now, if you have a tune designed for higher octane, or are getting ping, etc..then you would want to increase the octane.
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