BMW 3 series E30

Since 1983-1994 of release

Repair and car operation

+ 1. The maintenance instruction
+ 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
   14.2. Changed numbers
   14.3. Purchase of the old car or a mysterious set of figures and letters
   14.4. Durability of the car
   14.5. About parallelism of bridges of the car and the trailer
   14.6. Preparation of the car for winter
   14.7. A rule 35
   14.8. A choice of the second-hand car
   14.9. Engine oils
   14.10. That it is necessary to know, changing oil
   14.11. Occurrence in deposit oil
   14.12. Whether it is possible to mix import oils?
   14.13. "Eats" much, but silently goes
   14.14. It is more likely live, than it is dead …
   14.15. It is not got - a good advice
   14.16. Visit to car-care centre
   14.17. A gear belt for a mechanism drive газораспределения
   14.18. Deterioration of pistons
   14.19. Valves
   14.20. Bearings of engines
   14.21. Engine pollution
   14.22. As the conditioner works and what to do, if it has failed
   14.23. The conditioner: not only "pluses", but also "minuses"
   14.24. Rules of service of the conditioner
   14.25. It is not necessary to stir antifreeze with antifreeze …
   14.26. That it is necessary to know at purchase of the air filter
   14.27. An engine overheat
   14.28. That it is necessary to know to the owner of the car with инжекторным the engine
   14.29. The accumulator
   14.30. Possible malfunctions of the storage battery
   14.31. What to do with the failed generator
   14.32. The belt is guilty, and we blame the generator
   14.33. The catalyst
   14.34. Three in one - or how to save the catalyst
   14.35. Пробуксовочка
   14.36. Features of operation of brake system
   14.37. Malfunctions of brake system
   14.38. Brake liquids
   14.39. АБС: a natural choice
   14.40. Wheel disks
   14.41. We update wheel disks
   14.42. The scheme of marks of an automobile tyre
   14.43. Metal corrosion
   14.44. An automake-up
   14.45. What creaks?
   14.46. The hatch
   14.47. A safety pillow: troubles or pleasures?
   14.48. We fit well?
   14.49. Anticreeping "immunodeficiency"
   14.50. Why headlights grow dull
   14.51. "Галогенки"
   14.52. About correct adjustment of headlights
   14.53. The electric motor
   14.54. From change of places "composed" varies nothing?

14.12. Whether it is possible to mix import oils?

This and questions similar to it interest many motorists. The answer to the first – unfortunately, no even if it is oils of firms "with a world name" (Shell, Mobil, British Petroleum). Each firm makes commodity oils, adding to an oil basis the whole complex of the additives which chemical compound keeps in the big secret. Therefore, many the qualitative oils of identical appointment made under requirements concerning ekpluatatsionno-technical properties of international classification API and European specification SSMS-ASEA, but on technologies of various firms, at mixing are capable to create mixes of poor quality owing to interaction and взаимоуничтожения additives, that is "incompatibility" of additives. Oils of different firms are interchangeable, about possibility of use of such oils often specify моторостроители. But it does not mean that they can be mixed. Classification API and specification АСЕА assume obligatory identical test methods (laboratory, bench – motor etc.) oils of different firms. At desire (or necessities) моторостроители can enter additional tests (or more severe constraints) to these classifications.

The same concerns mixing of mineral or synthetic oils (sometimes – even one firm). Oils synthetic can have structure of hydrocarbonic character (in such cases of oil of one firm it is possible to mix, on what the firm the manufacturer of oil and makes recommendations for what it bears responsibility), other chemical compound. Unfortunately, cases when at mixing of oils their quality worsens are frequent. As a result of it can "begin to knock" the engine as the mix of incompatible oils turns to "jelly".

Even more negative answer to a question on possibility of mixing of import and domestic oils, especially what are made with the additive of "domestic" additives. Neither the seller, nor the consumer do not know structure of additives which are in oils. Some oils of "a domestic origin" are made by the "firms" which do not have even elementary knowledge on mineral oil. Sometimes such "experts" use the fulfilled oils (even without appropriate regeneration) to manufacture of "commodity". Thus and corresponding quality. Therefore concerning possibility of mixing of oils it is necessary to give councils very cautiously!

No "cleaners" ("Tokron", etc.) are capable to raise октановое gasoline number. For this purpose use special additives – antidetonators which add in the course of gasoline manufacturing at petrofactories, or additives. The detonation reason (metal knock in an engine operating time is audible) and калильного ignitions (the engine continues to work at the switched off ignition) can be deposits in the combustion chamber.

Compression increase in system "at introduction of some additives" occurs not for the account вязкостных additives as they do not incorporate them, and for other reasons. But it already a theme of separate conversation.

To reduce oil charcoal fumes in the old engine and to raise a compression in cylinders at the expense of use высоковязкостных oils it is inexpedient, поскольу it will lead at first to really increase of a compression in cylinders, but for a short while. Further engine repair will cost dearer.

The reason of "acoustic noise" in the old engine is its deterioration. Therefore, repair with the subsequent use of high-quality oil will more cheaply manage. It is possible to "reduce" backlashes additives, but it is necessary to understand expediency of it not to do much harm to the engine.

Now apropos "ship oils" and possibility of their use in "road diesel engines". There are different oils. Special ship oils for diesel engines concern group E, for example, М-16Е30, М-16Е60, М-20Е60, intended for малооборотных the diesel engines working on высокосерном высоковязкостном fuel – black oil. These oils have tehniko-operational properties (quality indicators), qualities of oils of "road" diesel engines different from indicators, therefore their use in automobile diesel engines it is impossible. There are ship oils of group D, for example, М-10ДЦЛ20, М-14ДЦЛ20, М-14ДЦЛ30 which are used in the diesel engines working on высокосерном fuel. Oils waterproof, but have the raised alkaline number and high зольность. For "road", that is automobile diesel engines it is the raised deterioration of the engine which can not pay off in due course free oil. Oil М-16ДР for ship diesel engines which work on дистиллятном fuel – diesel fuel with the raised viscosity compared with viscosity "automobile" and the maintenance of sulphur to 0,5 %, can be used in "road" diesel engines in the summer (for "heavy" cargo, instead of cars).

It is necessary to take for a rule: to use high-quality oil of one mark corresponding to the engine (on classification) and not to risk to mix it with same synthetic (or semisynthetic) oil. The engine will thank for it reliable work. Do not buy oil privately as packing is easy for forging.