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      01-03-2013, 03:34 PM   #10
excitablered
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Drives: X1 xDrive28i Valencia Orange
Join Date: Dec 2012
Location: NY

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Thanks for the responses. Definitely understand I should go with 91 or 93. I should have done the math before complaining about the extra cost, but your comment about "walking across to the Honda dealership", while hilarious, is kind of unnecessary. I just didn't realize I'd have to fill premium when buying a 'premium' car. There's also nothing wrong with trying to save money after making a huge purchase.

Out of curiosity, how much can the type of fuel you use lower your car's performance, in terms of mileage, acceleration, etc.?

Is there anything I should do before switching to a higher octane? Or will it not matter, considering I've only filled up 2 or 3 times?