Purpose of oil of the engine
Oil in the engine is intended for greasing of rubbing details and decrease in temperature at a friction. Oil plays the major role at maintenance of operability of the engine.
Consumption of oil
The small consumption of oil in use the serviceable engine is allowed. The raised consumption of oil the engine is caused by the following reasons.
Oil provides greasing of pistons, piston rings and cylinders. Between the piston and the cylinder there is an oil film which the piston perceives at movement down at a step of an admission or a working course.
When braking by the engine depression because of which there is a zasasyvaniye of an oil film and oil on cylinder walls in cylinder volume is created, and further oil burns down at influence of the heated gases in the course of combustion.
Oil also is used for greasing of cores of inlet valves.
A quantity of oil is sucked in in the chamber of combustion and burns down together with fuel.
High-temperature exhaust gases also дожигают oil which arrives for greasing of cores of final valves.
The consumption of oil depends on viscosity of oil, its quality and conditions of driving of the car.
The consumption of oil increases at high speed of movement, at frequent dispersals and accelerations.
Consumption of oil the new engine above as occurs extra earnings of pistons and rings to walls of cylinders.
Normal consumption of oil – no more than 1 l on 1000 km.
At check of level of oil keep in mind that because of an oil razzhizheniye true level difficultly to define.
For example, if on the car repeating short trips and a consumption of oil in norm are made, after run of 1000 km and more on щупе will not be observed at all level falling. It is connected with that oil is gradually diluted by fuel or moisture because of what the impression as if the consumption of oil in general is absent is made.
If then the trip with high speed is made, there is a strengthened evaporation of components diluting oil, and the impression as if the consumption of oil is higher than norm is made.
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