I have a 2015 FFE. When I first got the car in May 2015 with 6600mi on it I got 20mi on the battery. It has been at 17mi. for months now. I finally needed an oil change so last weekend I took it to the dealer which looked at it and said that the car was only charging to 87%. They reset the system and it then read 21mi. for all of 2 days. IT now reads 17mi. again. Not cool.