My Rav4 Hybrid is the first hybrid car I have owned and I find myself a little obsessed about trying to get the EC light to stay on as much as possible! My question is, what is the real world difference in this particular vehicle between trying to maximize the use of the EV, and not worrying about it with respect to MPG? Has anyone done a test where one tank they strictly try and see how much they can use EV, and the next tank not pay any attention to it whatsoever and compare the MPG averages? I'm sure there is a difference, but I'm curious just how much of a difference that would be? Perhaps I would be less obsessed with keeping it on if it were a small amount. Thoughts?