E30 series BMW 3

since 1983-1994 of release

Repair and car operation

- 1. Maintenance instruction
   1.1.2. Overall dimensions
   1.1.3. Place of the driver
   1.1.4. Dashboard
   1.1.5. Keys for the car equipped with an immobilizer
   1.1.6. Window regulators
   1.1.7. Safety cushions
   1.1.8. Board computer
   1.1.9. Indexes
   1.1.10. Voltmeter
   1.1.11. Tachometer
   1.1.12. Counter of the total passable way
   1.1.13. Sound signal
   1.1.14. 3-step automatic transmission
   1.1.15. 4-step automatic transmission
   1.1.16. Mechanical transmission
   1.1.17. Hand brake
   1.1.18. Period of a running in of the car
   1.1.19. Fuel
   1.1.20. Threefold catalytic converter
   1.1.21. Engine oil
   1.1.22. Brakes
   1.1.23. Ruled cargo placements in a luggage carrier
   1.1.24. Start-up of the engine and driving
   1.1.25. Driving receptions
   1.1.26. Trailer towage
   1.1.27. Actions at refusal of start-up of the engine
   1.1.28. A start order from the additional battery
   1.1.29. If the engine decayed during movement
   1.1.30. Actions at an engine overheat
   1.1.31. Actions at a wheel puncture
   1.1.32. Ruled towings
   1.1.33. Pressure check in tires
   1.1.34. Check of a condition and replacement of tires
   1.1.35. Shift of wheels
   1.1.36. Installation of winter tires and chains
   1.1.37. Check of an external condition of the battery
   1.1.38. Battery charging
   1.1.39. Specifications
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. Exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


1.1.21. Engine oil


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 and 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 1л 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 are made, and the consumption of oil in norm, 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 is made as if the consumption of oil in general is absent.

If then the trip with high speed is made, there is a strengthened evaporation of components diluting oil and the impression is made as if the consumption of oil is higher than norm.