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      02-16-2012, 06:15 AM   #183
Beedub
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Drives: 2007 Z4 M roadster vt2-500
Join Date: Sep 2007
Location: UK

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nah because we are not map switch you can mix it in with your fuel...... run low and just dunk it in!!! i usually fill with 98 octane to half a tank and then fill with 105 to get to a nice mix and i can see the difference on the a/f gauge......
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