I filled up for the first time at 366 miles after I got to the flashing bar. I put in 8.84 gallons into the car and that averages out to be about 41 mpg although the CRT readout had 48.2. It was interesting that the tank thought that it really was empty only 8.8 gallons into the 11.9 gallon tank. I was talking to a Pioneer Prius friend and he said that the tank sensors now are all digital and it may take 3 or 4 fill ups to correctly calibrate the sensors. Can anyone comment on this? :?