Engine Exhaust Cautions; Facts About Engine Oil Consumption - Toyota 1998 Camry Owner's Manual

Engine exhaust cautions

CAUTION
D
Avoid inhaling the engine exhaust.
It contains carbon monoxide, which
is a colorless and odorless gas. It
can cause unconsciousness or even
death.
D
Make sure the exhaust system has
no holes or loose connections. The
system should be checked
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the
checked immediately.
D
Do not run the engine in a garage
or enclosed area except for the
time needed to drive the vehicle in
or out. The exhaust gases cannot
escape, making this a particularly
dangerous situation.
D
Do not remain for a long time in a
parked vehicle with the engine run-
ning. If it is unavoidable, however,
do so only in an unconfined area
and adjust the heating or cooling
system to force outside air into the
vehicle.
154
D
Keep the trunk lid closed while
driving. An open or unsealed trunk
lid may cause exhaust gases to be
drawn into the vehicle. If you must
drive with the trunk lid open to ac-
commodate a large object, close the
windows, open all the instrument
panel vents and have the heating or
cooling system deliver fresh air into
the vehicle by turning the fan to
from
high speed with the air intake con-
trol set at the OUTSIDE AIR posi-
tion.
system
D
To allow proper operation of your
vehicle's ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
D
If you smell exhaust fumes in the
vehicle, drive
open and the trunk lid closed. Have
the cause immediately located and
corrected.
Facts about engine oil
consumption
FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are as
follows.
D
Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis-
ton moves downwards in the cylinder.
High negative pressure generated when
the vehicle is decelerating sucks some
of this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned
with the windows
by the high temperature combustion
gases during the combustion process.