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This thread is just packed with info I love it. I don't have my car yet, but I'd like to give it the proper treatment from day one. My main concern is in my city (and any city within a 200mi radius) the highest octane you can buy is 91. I was planning on adding an octane booster with my fuel to help this, but I don't know if there is a brand out there that anybody has used to prevent carbon build up on the spark plugs?
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2013 E92 M3 | Le Mans Blue | 6 Speed Manual | Competition Pack | Premium Pack | Cold Weather Pack |
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