F3/F3R OWNER’S MANUAL
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only in an unconfined area and
adjust the heating or cooling system
to force outside air into the vehicle.
●
Keep the luggage component lid or
back door closed while driving. An
open or unsealed trunk lid or back
door may cause exhaust gases to
be drawn into the vehicle.
●
To allow proper operation of your
vehicle’s ventilation system, keep
the inlet grilles in front of the
windshield clear of snow, leaves, or
other obstructions.
●
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the luggage component
lid or back door 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 maintaining
the engine in proper working order.
Engine oil consumption
It is normal that an engine should consume
some engine oil during normal engine
operation. The causes of oil consumption in a
normal engine are as follows.
●
Oil is used to lubricate pistons,
piston rings, and cylinders.
A thin film
of oil is left on the cylinder wall when a
piston moves downwards in the cylinder.
High negative pressure generated sucks
some of this oil into the combustion
chamber when the
vehicle is decelerating. This oil as some
part of the oil film left on the cylinder wall
is burned by
●
the high temperature combustion gases
during the combustion process.
●
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
temperature exhaust gases also burn
the oil used to lubricate the exhaust
valve stems.
The amount of engine oil consumed
depends 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 driving
and frequent acceleration and deceleration.
A new engine consumes more oil, since its