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Originally Posted by tomasj
640M, presume you are using k/gal US or UK? You are also diesel as well, correct?
'13 650ix GC, 21 city, 24 hwy, mix of modes
You other guys getting low to mid teens, are you traveling roads that have a lotta start/stops or pushing your cars really hard to get such bad gas mileage?
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tomasj
No not really, half highway half street and mostly in regular mode. Your mpg is actually closer to 6 cylinder mileage to me. What's the secret I'm missing?