The biggest problem I have with EOC with an auto is the wear and tear on the starter motor; I suspect they're not designed to tolerate such constant starting. Of course, i may be underestimating the quality of them.
I wish my final drive ratio was as tall as your Infinity. Best i can figure is it's in the realm of 3.8 to 1. My LeSabre had a 2.8 to 1 as best as i can tell, and it made a world of diffference. The rpms of the LeSabre compared to the Maxima in overdrive were nearly half.
That being said, there's plenty of folks quoting 30 mpg figures on the highway for this car. Maybe I shoud aim for 35 mpg. Wouldn't that be something!
I've been driving with a much lighter foot now past couple of days. In my minvan I generally can get 150 mpg on a half tank, but my father in law borrowed the van for the week and managed to beat me by 30 mpg. I commented on it and he told me it's because he drives a lot slower! (well, he is 80 years old.)
the gas pedal is a sensitive sort of friend. I suppose I better be nicer to it