Re: First tank in my Prius ..
Yep, check my tanks, too. You'll see the discrepancies between actual and MFD-calculated FE. Most of the time actual is lower, but the most recent one was higher! I'm also tracking when each of the pips disappear on each tank to see if there's a pattern. There's a LARGE variation there, as well.
Congrats on a great first tank!
Change what & how I drive, not who I am. Rack 'em up.