I think some people are showing average speed instead of average mpg which is in different order from previous computers. I have 2300 miles and it took a hwy trip of 380 miles to loosen it up and I got 30.9 at 75-80. My city driving has creeped up to 22-23 from 20-21 so I think they just need broken in about 5000 miles.
1995 325i,1996 328ci,1997 528i,1997 Z3 2.8,
2001 X5 3.0,2001 330i Conv,2002 M3 Conv,
2003 M3 Coupe,2004 M3 Coupe,2004 Z4 3.0,
2004 X3 3.0,2007 X3 3.0,2007 335i Conv.,
2013 X1 28 sdrive M Sport, 2014 M235 on order