Today I took an approximately 160 mile round trip from Wilmington NC to south of Myrtle Beach. The trip was mostly driven at about 55mph on Route 17 with some bumper to bumper traffic near Myrtle Beach. I drove entirely in the Power Mode and achieved a little over 57mpg. This compares to around 52mpg when I have driven the route in normal or ECO. Previously I have driven in the Power Mode around town and gotten over 59mpg compared to about 54mpg in normal or ECO. Based on these results and the improved performance, I see no reason not to drive all the time in the Power Mode. Am I missing something?