Machine Translated by Google
INFORMATION BEFORE DRIVING YOUR TOYOTA
289
Engine oil consumption data
FUNCTIONS OF ENGINE OIL
When assessing the amount of oil used,
take into account that the oil can become
diluted, making it difficult to accurately
determine its level.
The basic function of engine oil is to lubricate and cool
the internal parts of the engine and it has a great
influence on keeping the engine in proper operating
condition.
For example, if the vehicle is used for short-
distance driving and the oil consumption is
normal, the dipstick may not show any drop in
level even after driving 1000 kilometers or
more. This phenomenon is the result of the oil
being gradually diluted by fuel or moisture,
causing it to appear at a constant level.
ENGINE OIL CONSUMPTION
It is normal for the engine to always
consume a small amount of oil during
normal operation. The causes of oil
consumption in a normal engine are as follows:
Diluting components evaporate when you drive
at high speed, e.g. on the highway, etc.
In this case, it will seem to you that the oil is
being consumed excessively.
• Oil is used to lubricate pistons, piston rings and
cylinders. As the piston moves downward in
the cylinder, a thin film of oil remains on the
cylinder wall. If we reduce the engine speed,
a large negative pressure is created, during
THE IMPORTANCE OF CHECKING THE MO-
which some oil is sucked into the combustion chamber.
TOR OIL
This oil, as well as part of the oil film from
the cylinders, is burned at high temperatures
during the combustion process.
One of the most important tasks in vehicle
maintenance is to keep the engine oil level at
an optimal level so that the oil's function is not
impaired. Therefore, it is absolutely necessary
to check the oil level regularly. Toyota
recommends checking the oil level every time
you refuel.
• The oil is also used to lubricate intake valve
stems. A small amount of this oil is drawn into
the combustion chamber at the same time as
the drawn air and is burned together with the
fuel. Also, the high-temperature exhaust gases
burn the oil used to lubricate the exhaust valve
stems.
NOTICE
Failure to regularly check the oil level could
lead to serious engine damage caused by
a lack of oil.
The amount of oil consumed depends on its
viscosity, quality and the conditions in
which the vehicle is operated.
A larger amount of oil is consumed when driving at high
speed, frequent acceleration and deceleration.
Information on checking the oil level - see
"Checking the Engine Oil Level" on page 372 in
Section 7-2.
A new engine consumes more oil until its
pistons, piston rings and cylinder walls reach
optimum operating clearance.
Oil consumption: Max. 1.0 liter per 1000 km.
English 