On January 7, 2015 I had the 14E02 update done which required reprogramming the Power Control Module (PCM). Since that time my last 3 tanks of fuel (over 1500 miles) showed an increase in FE of over 2 mpg / over 5%. In addition, the difference between the fill up FE and the displayed FE has narrowed. For example, on the last tank I filled up at 514 miles and 11.30 gallons of fuel for a calculated average of 45.5 mpg. The display showed 45.7 mpg. I would have expected around 43 mpg actual with a displayed of around 44 mpg. I'm also noticing that on typical normal trips, the displayed FE has been around 5% above what I would have expected based on previous experience.
I will continue to monitor and compare FE as we get into the summer period.
IMO, something has changed and it isn't driving style. Has anyone else noticed a FE improvement after any recent PCM update (not just due to 14E02). I would not be surprised if Ford has tweaked the PCM software further enhancing FE. The PCM module info from FORscan is below. I assume the "strategy" (likely last two letters) is an indication of the revision level. Could others check what their strategy shows.