Well lets see, 15k miles in 6 months, average mpg has been about 44-47. I got the 10k service done at 12k. got crappy mileage and saw oil was over filled by at least a half qt, dealer took some out. Now after 3 tanks, I'm getting 50.1mpg and my CONS says the same thing, that is something that never happened before. I also got my tires at 44psi. so far happy with mileage, also the last tank was a long distace freeway drive, so the mileage is really good.
I pump it past the first click. Not by much, but you kind of figure about where you want it to be about the same everytime. My CONS used to be about 3mpg higher. I have tried all ways, either pwr full time, ECO full time and switch it around, but over all running in ECO has been about the best over all. If I need power, then I do a quick switch and then back to ECO.