Toyota Lexusc Owner's Handbook Manual page 447

STARTING AND DRIVING
NOTICE
A large amount of unburned gases flowing into the
three-way catalytic converter may cause it to overheat
and create a fire hazard. To prevent this and other
damage, observe the following precautions:
D Use only unleaded gasoline.
D Do not drive with an extremely low fuel level; running
out of fuel could cause the engine to misfire, creating
an excessive load on the three-way catalytic
converter.
D Do not allow the engine to run at idle speed for more
than 20 minutes.
D Avoid racing the engine.
D Do not push-start or pull-start your vehicle.
D Do not turn off the ignition while the vehicle is
moving.
D Keep
your engine
Malfunctions in the engine electrical system,
electronic ignition system or fuel system could cause
an extremely high three-way catalytic converter
temperature.
428
in good running order.