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      10-17-2012, 10:24 PM   #29
bimmerjph
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Drives: 2002 BMW 325i
Join Date: Oct 2011
Location: Tennessee

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Quote:
Originally Posted by Jatran661
38mpg from an n55 ? How come I get 20mpg for the us spec n55? Is it cause theres something to do with the quality of our gas?
Two reasons:
The biggest one is that the 1 US gallon equals roughly 1.2 UK gallons. And the other is that M135i has 8 gears where yours has 6 or 7 depending on your transmission. I suppose gas quality could be a factor too, but it would not be a significant as the other two.