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      09-20-2011, 02:01 PM   #81
Speed Demon
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Drives: '10 335d E90
Join Date: Oct 2009
Location: The 858

Posts: 3,248
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2010 335d  [5.00]
Initial install of the JBD will reflect incorrect MPG until the car becomes accustomed to what the JBD is doing. Give it some time to settle, and then you'll get an accurate readout. The best way to determine your actual gas mileage is to track from tank to tank.
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