I've been getting about 7.5 to 8 gallons per fill-up... At which point does the the low fuel warning indicator light up? About 2 gallon left (out of 10.6)?
I drove 2 more days after the last bar started blinking (with maybe 10 miles of HV at most, I'm guessing). When I filled up, it clicked off around 8.8 gallons. I filled it to $40 (trying to keep the number even since I'm using my $100 gas card I got from Dianne! thanks!), which came out to 9.1 gallons I think filling up 9 gallons or so is good for me. I used to fill up my last car before the light even came on (which was maybe 4 gallons left in a 19.8 gallon tank). I also thought the PiP tank was 10.6 gallons (and the regular Prius has a 11.9 gallon tank?)
There's a thread in the Fuelly forum that is discussing the kWh issue. Im not actually following it. Like a few others on Fuelly, I just noted my EV/HV ratio and their respective consumption (kWh and gallons) in the notes section. I'm actually surprised there are so few Prius on Fuelly in general.
In our Prius when the pump first click off you can still nurse another 2 full gallons in the tank with fuel being visible at the top of the filler neck. I know this is not good practice but if you have a long drive ahead with not many gas stations or many with gas over $5 per gallon it may not be such a bad idea. Thats an extra 100 miles which is a long way when you think about it...
I drove around one more day after last bar was flashing. Today I put in 9.95 gallons, that's the most I've ever put in.
