Audi 80/Avant (B4)
since 1991-1995 release
Repair and operation of the car
- Technical specification
Dynamics of the movement at a dry paving
Instructions on operation for all-wheel drive cars
Blocking of differential of the back bridge
Organization of a workplace
Right choice of engine oil
Replacement of engine oil and oil filter
Check of level of working liquid of the power steering
Check of level of oil of the mechanical transmission
Check of level of oil in the drive of the back bridge
Control of the ATF level in the automatic transmission
Check of level of oil in the main transfer of the automatic transmission
Lubricant of hummock drives, hinges and locks
+ System of production of the fulfilled gases
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ System of injection
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrical system
+ System of ignition
+ Signaling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ Body elements
+ Search of malfunctions
Part of engine oil burns down during lubricant action. So the consumption of oil is absolutely natural process. Well rolled engines spend 0,2 l for 1000 km, Audi calls the most admissible indicator an expense of 1,0 l on 1000 km.
The zero consumption of oil is suspicious
At winter operation at short distances maybe so that oil level between measurements is not diminished at all or even increases. It is at all not a reason for joy because means that engine oil is diluted with fuel or condensate. This oil changing the properties needs to be "boiled" during regular distant trips that condensate evaporated. At the end of a trip it is necessary to check the oil level because it considerably will fall because of evaporation of parts of gasoline and condensate! At extreme operation in the city without intermediate trips on a long distance it will be better if you change oil before usual; perhaps, after 3000 km or four months.
Correct specification of oil
As at rather long, 15 000 km, intervals of replacement of oil there is a danger of formation of a deposit in an oil case, Audi issued strict instructions to oil.
Viscosity of oil
The oil fluidity, that is its viscosity, has to conform to requirements for application in this engine. At the same time it is necessary to remember two criteria:
Classes on SAE
The American Society of Automotive Engineers distributed oils on classes according to their viscosity.
These classes begin at engine oils with liquid winter (winter) SAE 5W oil, 10W, 15W through an intermediate step of SAE 20W/20 to viscous summer SAE 30, 40 and 50 oils.
Production of the all-weather oil applied today is more difficult and therefore all-weather oil respectively more expensive, than seasonal. As the additive improving a viscosity index at it there are long chains of molecules which "inflate" when heating and again lose in volume when cooling. In this case oil can "elastically" adapt to temperatures and cover many classes of viscosity. SAE 15W-50 oil corresponds at a temperature of -15 °C to a class of viscosity 15W, and at 100 °C – to a class 50.