An incorrectly applied 13b07 shows similarly bad MPGs - so OP, fill us in on the history of your CMax. The fix is to have the dealer look at it and they can re-apply. Remember, this update is really finicky - dealers have to use LAN vs Wifi to apply this update and a few owners here got these issues and they did not know about it initially.
Wind plays a huge part, as I found out driving back from Vegas to LA in literally a sand storm (in parts), be lucky to eco cruise 38MPG like those Consumer Report boyz were reporting.
I recently did a 200 mile round trip, 50MPG at 65 to 75 mph freeway speeds, P&G and eco-cruise. but 44MPG is about right for eco, no frills easy peasy driving at speed. I had 1 passenger and 2 sets of golf club as load this time