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      10-03-2012, 07:36 AM   #14
mark896
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Drives: 2011 E92 335is
Join Date: Dec 2011
Location: Alabama

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Quote:
Originally Posted by ILSMKU
Is one lifetime mpg and the other your normal per tank mpg?
Even if it is, it doesn't matter--the point is that they drift. They have to be calculated at different places on the car, only thing I can think of.