BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

- 1. The maintenance instruction
   1.1.2. Overall dimensions
   1.1.3. A place of the driver
   1.1.4. The panel of devices
   1.1.5. Keys for the car equipped with an immobilizer
   1.1.6. Стеклоподъемники
   1.1.7. Safety pillows
   1.1.8. The onboard computer
   1.1.9. Indexes
   1.1.10. The voltmeter
   1.1.11. A tachometre
   1.1.12. The counter of the total passed way
   1.1.13. A sound signal
   1.1.14. 3-step automatic transmission
   1.1.15. 4-step automatic transmission
   1.1.16. A mechanical transmission
   1.1.17. A manual brake
   1.1.18. The period обкатки the car
   1.1.19. Fuel
   1.1.20. Threefold каталитический neutralizer
   1.1.21. Engine oil
   1.1.22. Brakes
   1.1.23. Rules of placing of cargo 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. An order of start from the additional battery
   1.1.29. If the engine has decayed during movement
   1.1.30. Actions at an engine overheat
   1.1.31. Actions at a wheel puncture
   1.1.32. Towing rules
   1.1.33. Pressure check in tyres
   1.1.34. Check of a condition and replacement of tyres
   1.1.35. Shift of wheels
   1.1.36. Installation of winter tyres and chains
   1.1.37. Check of an external condition of the battery
   1.1.38. Battery gymnastics
   1.1.39. Specifications
+ 2. Maintenance service
+ 3. The engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
+ 7. An exhaust system
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. A running gear
+ 12. A body
+ 13. An electric equipment
+ 14. A good advice


1.1.21. Engine oil

Appointment of oil of the engine

Oil in the engine is intended for greasing of rubbing details and temperature decrease at a friction. Oil plays the major role at maintenance of working capacity of the engine.

The oil expense

The small expense of oil while in service the serviceable engine is supposed. The raised expense of oil the engine is caused by 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 downwards at a step of an admission or a working course. At braking by the engine depression because of which occurs засасывание 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. An oil quantity is sucked in in the chamber of combustion and burns down together with fuel. The high-temperature fulfilled gases also дожигают oil which arrives for greasing of cores of final valves.

The oil expense depends on viscosity of oil, its quality and conditions of driving of the car.

The oil expense increases at high speed of movement and at frequent dispersals and accelerations.

The oil expense the new engine above as occurs extra earnings of pistons and rings to walls of cylinders.

The normal expense of oil – no more 1л on 1000 km.

At check of level of oil keep in mind that because of разжижения oils true level to define difficultly.

For example, if on the car repeating short trips, and the oil expense in norm after run of 1000 km and more on щупе it will not be observed at all level falling are made. It is connected by that oil is gradually diluted by fuel or a moisture because of what the impression is made as if the oil expense in general is absent.

If then the trip with high speed there is a strengthened evaporation of components diluting oil is made and the impression as if the expense of oil above norm is made.