Thread: 87 vs 91 octane for better mpg?
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Old 01-22-2008, 07:13 AM
oscars2212 oscars2212 is offline
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Real Name: scott
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Default Re: 87 vs 91 octane for better mpg?
so a high-compression engine will get better gas mileage, and not just max HP, from using premium gas over regular?

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