Focus Fanatics - View Single Post - 91 or 93 Octane, which is more common?
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Old 03-02-2011, 09:01 AM   #6
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I just thought of something. Midgrade gas is mixed anyway, right? So would I be able to fill up with equal parts 89 and 93 to get 91 in places that don't have 91? Or am I way off there?
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