MPG displayed on Toyota Prius' Energy Consumption screen.
Both of my car pool partner and me have a Prius. His is 2005, mine is 2008. Later last week, he added gas before we drove home. When we arrived, the MPG on his car showed 53.1. I added gas in the same gas station before going home yesterday. But when we arrived, the MPG on my car showed 48.3. I am not sure is the new model less efficient or Toyota used different calculation now. Also, as for the last 30 minutes MPG for my drive (it took us about 30 minutes to get home), 5 of those 6 bars were over 50, 2 of them were over 75. Only 1 bar was a little bit blow 50. And there were not a lot of traffic light stops (the roads are not crowded at all in the suburb of Pittsburgh). If the MPG shown on the screen is for this tank of gas, this 30 minute drive was about all I had for this tank of gas. Mathematically, the number 48.3 doesn't make sense. What did I miss? Thanks.