And now that I just received my tag that says "40 MPG" I'll continue going easy on the gas pedal!

That's putting a lot of pressure on yourself. I'm striving towards 39 but I don't want to get a plate with that on it as from all I can read I'll see a 15% loss in FE this winter. If that relates to 33 mpg then I'll be driving the 4Runner when it's cold.