I actually like the start/stop feature, and while I can't speak for Ford's engineers, it's certainly not unheard of that this function can increase engine wear. It's long been blamed for the huge number of failures of BMW's N20 2.0T engine--specifically that the plastic timing chain guides get brittle, and extensive use of the start/stop system stretches the timing chain and eventually the whole thing implodes.
My daughter's X3 suffered this failure after heavy start/stop usage in Chicago rush hour traffic. The service advisor wouldn't admit any fault, but they quickly agreed to warranty it and I couldn't help but notice that my relatively small town BMW dealer actually keeps these engines in stock, which told me everything I needed to know.
My daughter's X3 suffered this failure after heavy start/stop usage in Chicago rush hour traffic. The service advisor wouldn't admit any fault, but they quickly agreed to warranty it and I couldn't help but notice that my relatively small town BMW dealer actually keeps these engines in stock, which told me everything I needed to know.