Toyota prius Owner's Manual page 142

1-6. Refueling
CAUTION
 When refueling
Observe the following precautions to prevent fuel overflowing from the fuel
tank:
 Securely insert the fuel nozzle into the fuel filler neck
 Stop filling the tank after the fuel nozzle automatically clicks off
Do not top off the fuel tank

 When replacing the fuel tank cap
Do not use anything but a genuine Toyota fuel tank cap designed for your
vehicle. Doing so may cause a fire or other incident which may result in
death or serious injury.
NOTICE
 Refueling
Do not spill fuel during refueling.
Doing so may damage the vehicle, such as causing the emission control
system to operate abnormally or damaging fuel system components or the
vehicle's painted surface.
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