James, first off congratulations on the 57.7mpg! That's great and doesn't come easy. You must be doing pretty much everything right. I'm only on my 5th tank, so am still trying out different techniques. Are you letting up on the gas pedal to see how light you can keep it and still maintain speed? I've found that on level surfaces when I try to pin the instantaneous fuel gauge that I can get better mpg for a significant amount of time before the speed begins to slowly drift downwards. I think of it as a hi-speed P&G, with much less variation in miles per hour, maybe 5mph. Even going down a very slight decline can give you an opportunity to max out the mpgs and go into EV mode. Thanks for the thread! I hope to learn from the other drivers out there who've gotten super mpg!

Scott