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Old 06-24-2013, 02:34 PM
The X Men The X Men is offline
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Location: MA
Join Date: Mar 2012
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Mein Auto: 2013 X3 35i
Originally Posted by Jimsan View Post
My door says 89 octane minimum for my 2014. So if I go to a higher octane will I notice a markedly higher performance? How do I notice it?
Notice a markedly higher performance? No. Going from 89 to 91 octane, you might gain 1 or 2 HP, you will not feel it.
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