Facts About Engine Oil Consumption - Toyota LAND CRUISER Owner's Manual

When taking a nap in the vehicle,
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always turn the engine off. Other-
wise, you may accidentally move
the shift lever or depress the accel-
erator pedal, which could cause an
accident or fire due to engine over-
heating. Additionally, if the vehicle
is parked in a poorly ventilated
area, exhaust gases may collect and
enter the vehicle, leading to death
or a serious health hazard.
PICK−UP: Toyota does not recom-
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mend occupying the rear cargo area
when it is fitted with a slide−in
camper, camper shell or other type
cover while the engine is running.
This caution applies to both driving
and stopped or parked situations
with the engine running. Particular
care should be taken to prevent ex-
haust gases from entering camper
bodies, trailers or other enclosures
on or around your vehicle. If ex-
haust fumes are detected, open all
windows and thoroughly ventilate
the area.
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. taining the engine in proper working order. taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con- It is normal that an engine should con- It is normal that an engine should con-
sume some engine oil during normal sume some engine oil during normal sume some engine oil during normal
engine operation. The causes of oil engine operation. The causes of oil engine operation. The causes of oil
consumption in a normal engine are as consumption in a normal engine are as consumption in a normal engine are as
follows.
Oil is used to lubricate pistons, piston Oil is used to lubricate pistons, piston Oil is used to lubricate pistons, piston
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rings and cylinders. A thin film of oil rings and cylinders. A thin film of oil rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis- is left on the cylinder wall when a pis- is left on the cylinder wall when a pis-
ton moves downwards in the cylinder. ton moves downwards in the cylinder. ton moves downwards in the cylinder.
High negative pressure generated when High negative pressure generated when High negative pressure generated when High negative pressure generated when High negative pressure generated when
the vehicle is decelerating sucks some the vehicle is decelerating sucks some the vehicle is decelerating sucks some the vehicle is decelerating sucks some the vehicle is decelerating sucks some
of this oil into the combustion chamber. of this oil into the combustion chamber. of this oil into the combustion chamber.
This oil as well as some part of the oil This oil as well as some part of the oil This oil as well as some part of the oil This oil as well as some part of the oil This oil as well as some part of the oil
film left on the cylinder wall is burned film left on the cylinder wall is burned film left on the cylinder wall is burned film left on the cylinder wall is burned film left on the cylinder wall is burned
by the high temperature combustion by the high temperature combustion by the high temperature combustion
gases during the combustion process. gases during the combustion process. gases during the combustion process.
D Oil is also used to lubricate the stems
of the intake valves. Some of this oil
is sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem-
perature exhaust gases also burn the
oil used to lubricate the exhaust valve
stems.
The amount of engine oil consumed de-
pends on the viscosity of the oil, the
quality of the oil and the conditions the
vehicle is driven under.
More oil is consumed by high−speed driv-
ing and frequent acceleration and decel-
eration.
A new engine consumes more oil, since
its pistons, piston rings and cylinder walls
have not become conditioned.
Oil consumption: Max. 1.0 L per 1000
km (1.1 qt./600 miles, 0.9 lmp. qt./600
miles)
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