Well, in the last 2255 miles my Insight has averaged 61.4 mpg
(UK), which is 51.1 mpg (US)...
Here's the UK Government's PCFCO (Passenger Car Fuel Consumption Order) figures for the 2011 Insight. As you can see, the official combined fuel consumption for my car is.... 61.4 mpg
PCFCO snip Honda Insight.jpg
I'm happy enough with that, even if the MID isn't spot on (mine actually seems pretty good)...