I have been driving like i have an egg under the pedal just to see the milage the eco light hardly ever comes on. i can almost coast at 45 and the eco light may sometimes come on, not always, on my 15 it was always coming on and you could not feel the cylinders cutting in or out on my 19 you can feel and hear them, with the window down( exhaust sound). I feel this may have something to do with the regen eng braking on an ETorque. Having the eng of at a stoplight helps save gas but not having the eco come on during slow down may negate this. I have several thousand miles on it and most modern engines don't really get that loose to where your mileage goes way up. Was told there is a power train control module update , And mine does shake a little and run rough on cold start maybe that will help.