dlgl00

I appreciate all your comments. I went back and checked the last 500 mi. as was suggested by one of the posts. With that limited range I get an average MPG of 39.9. And if I allow for the 1MPG difference Jerry experiences then I am getting pretty close. I think I will try the reset suggestion just 'cause my engineering background makes me a little AR about these new fangled technical contraptions. Jack is correct in that I was assuming they kept a longer history in order to make the calculations. Thanks again for all the comments Gary

I have a 2010 FFH with 23K miles on it. The city/highway mix is probably 25/75%. I keep track of my mileage on a spread sheet from the day we bought the car (I know, get a life). The MPG since we bought the car is 37.5 on paper. For the first 11K miles the long term MPG started about 41 and was slowly working its way down to what my calculated mileage was. It showed about 38.4 on the dash display. At 11K I had the dealer upgrade the program as recommended for some brake anomalie. After that, the LT MPG began creeping up until today it hit 41.1. My calculated MPG since day 1 is 37.5 and the calculated MPG from the point the reprogramming took place is 38.0. It appears that when they did the reprogramming they changed the Long Term MPG algorithm so now it is producing an erroneous MPG calculation. I filled the tank today and the "Miles to E" registered at 701 when I started the car. That would imply they are using the 41.1 number to calculate the Miles to E. This is now a deceiving number. I am not really worried about running out of gas but I was just wondering if others have experienced this problem. I know bringing this up to the dealer will get blank stares and "never heard of anyone else with this problem". Is there any other place to ask this type of questions to real Ford technical experts? Overall we love our FFH and are pleased with the performance. This problem is a nit compared with the good features we enjoy. Gary