VW Passat B5

since 1996 release

Repair and operation of the car



Foltsvagen Passat B5
+ Maintenance instruction
+ 1. Maintenance
- 2. Engines
   2.2. General information
   2.3. Lower mudguard of a motor compartment
   + 2.4. Four-cylinder petrol engine
   + 2.5. Diesel engine 1,9-I-TDI
   + 2.6. Drive of the gas-distributing mechanism
   - 2.7. Engine 2,8-I-V6
      2.7.2. Removal and installation of a head of the block of cylinders
      2.7.3. Check of a compression in engine cylinders
      2.7.4. Check of the engine by means of the vacuum gage
      2.7.5. Removal and installation of a poliklinovy belt
      2.7.6. General recommendations about engine oils
      2.7.7. Circulation of engine oil
      2.7.8. Check of pressure of oil and sensor of pressure of oil
      2.7.9. Removal and installation of the oil pallet
      2.7.10. Start of the engine after capital repairs
      2.7.11. The main malfunctions at start of the engine
      2.7.12. Main malfunctions of the lubrication system
+ 3. Cooling system
+ 4. Fuel system
+ 5. Engine management
+ 6. Exhaust system
+ 7. Transmission
+ 8. Running gear
+ 9. Steering
+ 10. Brake system
+ 11. Body
+ 12. Heating, ventilation
+ 13. Electric equipment






2.7.6. General recommendations about engine oils

GENERAL INFORMATION

Viscosity of oil

Viscosity of engine oils


Viscosity characterizes oil fluidity. Depending on temperature oil tends to reduction of fluidity. In process of increase in temperature oil becomes more fluid. It worsens ability of oil to stickiness and stability to maintain high contact pressures. When cooling oil gets denser, fluidity decreases and internal friction increases. Because of this property it is necessary to apply engine oil with such viscosity which changes at change of temperature in perhaps smaller limits.

At start of the cold engine oil has to be sufficiently liquid excessively not to overload the engine and that after start oil got quicker into all places where lubricant is necessary.

The fluidity of oil is equivalent to its internal friction and is designated by SAE units (Society of Automotive Engineers - Association of Automobile Engineers), for example SAE 30, SAE 10. The high rate of SAE means that oil dense, low – characterizes liquid oil. Nevertheless, viscosity of oil completely does not characterize lubricant properties of oil.

All-weather oils

In engines of cars it is preferable to use all-weather oils. Advantage of all-weather oils consists that they do not need to be chosen seasonally. They izgotavl are howled on the basis of liquid one-seasonal oil (type 10W). In a heated state this oil is stabilized by a so-called thickener that provides the corresponding lubricant qualities of oil at all temperatures. When using all-weather oil, it is necessary to apply modern grades with a wide temperature range of viscosity, for example 10W-40, 15W-50.

The letter W (winter – winter) in the designation SAE characterizes suitability of use of oil during the winter period.

Classes of viscosity and range of use of oil

As the range of use of the next classes SAE are blocked, it is possible not to pay attention to short-term temperature fluctuations. Mixing of oils of various classes of viscosity is allowed if the oil dolivka is required, and surrounding temperature does not correspond to the class of viscosity of oil which is filled in in the engine any more.

At long external temperatures below -20 °C it is recommended to fill in SAE 5W-20 oil.


Prevention

The CD engine oils which the producer designates as oils for diesel engines are unsuitable for petrol engines. There are oils which use is possible in two types of engines, in this case both designations, for example SG/CD are indicated containers with oil.

Additional additives to oil, irrespective of their look and appointment, should not be added to oil.


Engine oils

For modern engines it is necessary to use only oils D. HD oils are oils with the increased lubricant properties improved at the expense of various additives. These additives provide the best anticorrosive protection, more favorable conditions against the oxidation phenomenon, the smallest tendency to formation of slags, the best change of viscosity clearing and dissolving properties. The clearing and dissolving additives not only reduce formation of the remains in the engine, but also at the same time these remains and all other pollution in engine oil have ability to dissolve and keep in suspension so that when replacing oil these pollution are removed together with the merged oil.

Quality of HD oils is determined by the API system (American Petroleum Institut). The European producers also adhere to this system.

Designation of a grade of oil is made by two letters. The first letter character zut a scope: S-Servise, are intended for carburetor engines; With – Commercial, are intended for diesel engines.

The second letter defines an oil grade in alphabetical order.

Premium oils on classification of API are SG for carburetor engines and CD for diesel engines.

Petrol engines

And – all-weather oils with the increased antifrictional properties, the VW 500 00 specification.

In – all-weather oils, the VW 501 01 specification;
    – all-weather oils, API-SF or SG specifications.

Diesel engines

And – all-weather oils with the increased antifrictional properties, the VW 500 00 specification (for diesel engines with a turbo-supercharging only in mix with the VW 505 00 specification).

In – all-weather oils, the VW 505 00 specification (it is unlimited for all diesel engines);
   – all-weather oils, the API-CD specification (for diesel engines with a turbo-supercharging only in urgent cases for a dolivka);
   – all-weather oils, the VW 501 01 specification (for diesel engines with a turbo-supercharging only in mix with the VW 505 00 specification).