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      08-03-2012, 09:29 AM   #17
BimmerEnthusiast99
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Drives: '12 X5d; '10 335; '09 128
Join Date: Oct 2011
Location: Texas

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Highway mileage is where you see a pretty big difference---the efficiency and torque of the diesel allows it to cruise along consistently at little effort. City, I'd expect 2-4 mpg more from the diesel realistically.

With waverunners and your current N55, I doubt you'll see a difference of 1 mpg from day-today non-towing driving