IndySteve

I noticed a slight increase in displayed MPG in my first tank since having the software update done in August 2013. On the other hand in my first two tanks since the update, the difference between displayed and hand-calculated MPG went up. Prior to the update, the trip odometer MPG for the tank (reset at fill-up) was within about 1 MPG either way of the measured mpg. After the update, the display is 2 MPG over the calculated MPG. I'm only on my third tank since the update. One tank lasts me about 3 weeks or so.

Hi Everyone This is my first post. in March I got my blue C-Max Hybrid SE. My lifetime showing MPG is 44.9 at just over 6,000 miles. Very little highway driving. Ptjones, your use of the scan gauge is the first I've heard of with the C-Max. As I understand it, the scangauge is an OBDII reader. I tried to attach my Garmin Eco-route HD OBDII reader to my c-max, but it doesn't seem to be getting any power from the OBDII port. Has anyone else tried the Ecoroute HD either successfully or unsuccessfully? Somebody stole my portable Garmin GPS that displays the Ecoroute data, so I'll have to wait until Santa brings me a new one. (Ecoroute HD