Jason, just a bit o curiosity on my part...do you know if that MPG readout is actually accurate? Have you verified it by doing the math? Thats great economy...my wife's 2008 Nissan Rogue barely gets that kind of economy and thats with a 2.5l 4 cylinder and a CVT.
I've had several cars with trip computers and real time MPG readouts...they all varied wildly...my 2002 Nissan Altima was the worst...it usually ready about 4mpg too high. 2002 Audi A4 was the most accurate, never o by more than a tenth.