I can almost understand why Toyota didn't bother with a "total lifetime" MPG meter, since it essentially wouldn't change very often after the first few fill-ups. But given that it would be easy enough to make the software keep track of just about any metrics, I'm not sure why Toyota decided to not include

- Lifetime MPG (connected to ODO)
- Trip MPG (directly connected to Trip Odometers A and B)

I see that such things are already in place on the Honda hybrids... wish Toyota had thought of that as well. Especially the "trip" meters, since they could do exactly what Eric is trying to do here.... keep track of your mileage for the day, or for a certain route, or.... whatever. It's up to you.

Keep the "tank" system just as it is, just add a line below the current tank readout on the Consumption screen, which would show whichever gauge (ODO/Trip A/Trip B) is showing on the odometer at the current time.

Just my $.02. I'd love to see that software upgrade made, but probably wouldn't buy a new Prius just to get it.