Ford Focus Forum, Ford Focus ST Forum - View Single Post - anyone using premium gas ?
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Old 05-01-2012, 11:22 AM   #9
dan03833
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If your engine is not knocking and/or pinging there will be no difference in using 87 Vs 93 octane. The only thing the higher octane would do is reduce a tendancy for pre-detonation (knocking/pinging). The engine is designed/engineered to use 87, anything more would be a waste of money.
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