Here's my mileage for my Signature's first 2700mi:
It's actually averaging better MPG than my old 2014 CX-5 2.5L:
Not much winter driving in the new one though, which drastically lowers MPG.
Mine is quite loud at highway speeds, cross or no cross winds, no roof rack. Seems to come from the top rear portion of the window/door.
I have not brought it up with the dealer yet.
Has anyone else experienced this? Has it been fixed? I have wind noise from the upper left corner of the door/window, however, pressing on it while driving makes no difference.