I've run all my vehicles out of fuel, most of them multiple times. The Prius is actually rated 10.4 gallons, but it always clicks off at 10.2. I can probably get 0.2 more in if I filled up the filler neck too, or just gave the pump a couple more squeezes.
Tank size is an estimate, but it' pretty darn close.
Once I calculated I could go 500 miles on a tank, and the car ran out of fuel as I turned into the petrol station. I coasted to a stop exactly as the odometer rolled to 500.
I know how much range I have left in all my vehicles within about 5 miles of error. Whereas the fuel light and needle cause my wife anxiety, I relax and figure the best place to stop for fuel knowing I'll make it.
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