I finally got around to getting the new Multi ECU update done. As everyone else states there is a definite difference in response in blue mode. I have yet to get a chance to test it out, but is it best to drive in blue once warmed up at highway speeds or is black better? I notice my indicator shows I am being "less efficient" when I have the cc set on flat road and i switch from blue to black. It is odd to see that however because I notice my dial for mpg goes up a blip or two. Anyone have any concrete results yet?