Toyota PRIUS Manual page 189

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.
 Notice about fuel
For plug-in hybrid vehicles, fuel may remain in the tank for a long time and
undergo changes in quality depending on the how the vehicle is used.
Refuel at least 20 L (5.3 gal., 4.4 Imp.gal.) of fuel every 6 months (refuel a
total of at least 20 L [5.3 gal., 4.4 Imp.gal.] over a 6-month period), as this
may affect components of the fuel system or the gasoline engine.
PRIUS PHV_OM_OM47831E_(EE)
1-7. Refueling
1
189