Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum - View Single Post - anyone using premium gas ?
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Old 12-04-2011, 11:39 AM   #18
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Originally Posted by BetaDnB View Post
I use premium because it says right in the manual "premium fuel will provide improved performance" (pg. 354 (2nd printing)). Plus my station two blocks away from home has ethanol free premium.
If you read the whole paragraph its talking about the fact that in some regions regular is 85 octane and that using premium will give better performance than 85. It does not say you will get better performance than 87 octane.
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