Having just driven a rental 2012 van with the ECON button, I have been wondering about it's purpose and whether it actually adds anything.
My understanding is that the programming of the shift points in the transmission computer is altered depending on whether ECON is on or not ????
When ECON is on (i.e. light ON), the transmission shifts at low speed are rougher, but presumably (from the name), fuel economy is better? Correct?
When ECON is off, presumably the opposite is true - better shifting at low speeds but worse economy?
So, for you ('11-'12) owners, is the normal operation of the car, to constantly switch this button on and off depending on driving destination?
Has anyone quantified the mpg difference between running with ECON on or off? Say, running a couple of tanks through and keeping the ECON always on, and then a couple of tanks with it off?