I always try to drive the car how it was built to be driven.. Lots of coasting, re-gen breaking and "driving like a puss" as i am told. I can hit 60 mpg while doing 60-65 mph on the highway (carpool) lane.. 50-55 is pretty typical for me but I do a lot of city driving and really utilize the tools that the car has to achieve optimum MPG. I like the displacement of the cars energy screen so you know exactly when you are using the battery, I also try to utilize the battery only by lightly pressing on the gas while or after coasting to get the car to drive by battery only while the car is in motion. I utilize that whenever I can because thats free energy from the re-gen. I have had my Insight on battery only going for speeds of over 50mph, but not for a great distance, but even if its for a 1\4-1\2 mile its clean recycled energy. I know I am not alone to say that I get better than whats advertised at 42\44.. I get that in the winter, thats about the only time tho. Use the ECON, coast and try to coast at times letting the cars re-gen slow you down, dont punch it because we all know the insight will just get loud, seem angry and it doesnt have the pull so its just wasting gas.