I've seen this too and don't understand it.

Another puzzler for me is how many gallons in the tank. When I refill with the flashing bar, 7 gallons does the trick. My odometer was showing 343 miles but my avg mpg was only 40 mpg.

343/7 = 49 mpg and I only hit that once, on the highway, briefly. My mpg declined to 40 mpg.

I'm wondering if I have more gas than the gas tank shows.

Infael

2004 Gray Prius with smart start/entry and VSC