When I first charged up my Prime it said I had about 23 miles expected on a charge. Thanks to this forum I learned about how the "guessometer" worked and that it would likely increase over time. And here is the "progress report" after one month of ownership. Except for one charge where the expected EV range went down by 0.2 miles (no idea why), the "guessometer" has gone higher every time, up to 31.5 miles now. And except for one 100 mile round trip, it's almost all been in-town EV driving. Even with that one long trip, I'm still at 177 MPG and the tank is still nearly full! I'm loving my Prime so far.
congrats... I'll never hit that high based on my terrain. Be aware though that the AVG (gas and electric) is also way over optimistic compared to real life calculated mileage.
At 4500 miles and have yet to get higher than 27.3 miles. Guess my foots too heavy or there are too many hills. iPad ?