87 octane vs 91 octane

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02-22-2011, 08:51 PM

6789olds

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87 octane vs 91 octane

does any one know witch has more btu's 87 vs 91 ? i know kinda stupid ??

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02-23-2011, 10:56 AM

straped for cash

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I think its the same. Google api index, ron and mon. If you have ethanol added the btu's get lower.

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