Ford Focus Forum, Ford Focus ST Forum - View Single Post - How much better is 93 octane vs 91 octane
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Old 01-02-2013, 04:21 PM   #6
bigdesignmachine
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I have been running 93 octane ever since the first tank of gas the dealership filled me up with. I believe I was using 83 prior to 93 but I may have that octane rating wrong. I didnt see much of a gain in MPG....I would say perhaps 1 - 3 MPG on avg depending on my driving and the weather.
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