Quote:
Originally Posted by Red Bread
I think we've had about a handful of tanks above 20 mpg. Most are between 16 and 18. Actually a little better than our N54 135i. My wife has an absurdly short commute and a heavy foot though.
Thanks for the data points and info on the OBC, good to know.
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+1
We do get some highway miles in there so our average is around 18mpg
We had an F30 335 8AT right before this, and it was interesting that in the same conditions that car was averaging 22mpg. That ~25% increase in fuel econ is fairly proportional to the decrease in cruising engine RPM from going to the 6AT in the X135 to the 8AT in the 335