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<blockquote data-quote="1911Sooner" data-source="post: 4213452" data-attributes="member: 9"><p>So this got me thinking. I have a Mustang GT and it has a high compression. The manual says 87 is fine to run but recommends 93 octane. Around here I have 87, 89, and 91 octane. I can get 87 octane pure gas no ethanol. But the 89 and 91 octanes both have ethonaol. So my question is am I better off using 87 pure gas vs 91 with ethanol?</p></blockquote><p></p>
[QUOTE="1911Sooner, post: 4213452, member: 9"] So this got me thinking. I have a Mustang GT and it has a high compression. The manual says 87 is fine to run but recommends 93 octane. Around here I have 87, 89, and 91 octane. I can get 87 octane pure gas no ethanol. But the 89 and 91 octanes both have ethonaol. So my question is am I better off using 87 pure gas vs 91 with ethanol? [/QUOTE]
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