So I have had the V for about 6 Months and using the ECO button off and on. I drive normally no lead foot and no grandma either, but recently I have kept it on just to see if there was a difference. For about the past 2 months I have been getting roughly 32- 33 mpg, but if I could better that I would really like to. I was wondering if there was good times to use the ECO verses not using it?? Better on the highway or city? Has anyone found the best uses for it or is it just a shot in the dark.