Wentworth's complete fueling history
This tank was showing some excellent results with most rides in the low to mid 60s. The problem is that just a few bad rides can really knock it down. I had two in particular, and a third to a lesser degree, that were huge mileage droppers due to cold, but in particular moist weather, which seems to have a severe negative effect on the timely shutting down of the ICE (internal combustion engine), which is crucial in the Prius for higher mileage.
In any event, here are some snapshots from this past tank. It's important to note that the display screen can vary from about 2 mpg on average from reality, sometimes more. I always hand calculate at the end, so the 55.5 mpg you see at the top is from the gallons put in and the miles driven, not from the inaccurate display screen. I'm pretty confident that with a stretch of drier weather and temperatures higher than freezing that I'll have a nice crack at a 60mpg/3.92 L/100km tank (ok, 400 miles or so, I don't like to get close to empty :-D) sometime soon, hilly driving be damned!