Audi 80/Avant (B4)

since 1991-1995 of release

Repair and car operation



Audi 80/Avant
- Technical specification
   Engines
   Transmissions
   Body
   Chassis
   15-inch wheels
   Brake system
   Seats
   Passive safety
   Full drive
   Distributive Torsen-differential
   Dynamics of movement at a dry paving
   Instructions on operation for all-wheel drive cars
   Blocking of differential of the back bridge
   Motor compartment
   Regular servicing
   Workplace organization
   Lubricant works
   Consumption of oil
   Right choice of engine oil
   Replacement of engine oil and oil filter
   Check of level of working liquid of the amplifier of a wheel
   Check of level of oil of a mechanical transmission
   Check of level of oil in a drive of the back bridge
   Control of level of ATF in an automatic transmission
   Check of level of oil in the main transfer of an automatic transmission
   ATF replacement
   Greasing of hummock drives, hinges and locks
+ Engines
+ System of production of the fulfilled gases
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and airintaking channels
+ injection System
+ Coupling
+ Transmission and transmission
+ Suspension bracket and steering
+ Brake system
+ Anti-blocking system of brakes
+ Wheels and tires
+ Body electrosystem
+ ignition System
+ Lighting
+ Signalling devices
+ Devices and auxiliary devices
+ Heating and ventilation
+ body Elements
+ Search of malfunctions
+ Specifications





Consumption of oil

The 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 consumption of oil your Audi 80 depends on the following circumstances:

  • The modulation of oil leads to a high expense because ventilation of a case blows its surplus.
  • Liquid oil burns down quicker, than dense. Seasonal oil becomes in the warmed-up condition liquid as water, and the expense respectively increases. All-weather oil remains to more viscous; first of all those who goes on a long distance, can notice a smaller consumption of this oil.
  • All-weather oil which remains in the engine too long, becomes more liquid, the highest class вязкоти "is lost", the need for a dolivka respectively increases.
  • Sharp style of driving except the raised consumption of gasoline increases also a consumption of oil. Especially strongly it is appreciable, if the new engine is exposed at once to big loadings.
  • During a running in the engine needs bigger quantity of lubricant means.
  • Engine leakage. Check according to the scheme described in head Engines.
  • Defect in the engine; for example, defect of sealing laying (a maslosjemny cap) valve core, too big gap between directing and sealing laying of the valve, piston rings are defective or incorrectly established п

The zero consumption of oil is suspicious

At winter operation on short distances can be and so that oil level between measurements is not diminished at all or even increases. It at all a reason for pleasure because means that engine oil is diluted with fuel or condensate. This oil changing the properties is necessary for "boiling" during regular distant trips that condensate evaporated. At the end of a trip it is necessary to check 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 the usual; probably, after 3000 km or four months.

In the winter it is necessary to reckon with gasoline impurity in oil approximately in 2 — 3 %, and thanks to better dosed-out enrichment of gas mixture in our vpryskovy engines at start of the cold engine in oil less gasoline, than gets to the old carburetor.

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.

  • Usual mineral oil should correspond to the Volkswagen 50101 standard (VW-Norm 50101). In this case it possesses sufficient cleaning properties for prevention of formation of a deposit.
  • Oils with good antifrictional properties reduce an internal friction in the engine. They should correspond to a standard 500 00 (VW-Norm 500 00).
  • Only if oil from listed is inaccessible above, it is possible for dolivka to apply all-weather or seasonal oil of the categories "API SF" and "API SG".

 Help: such factors as the price of oil or its origin, still speak nothing about its quality!

Viscosity of oil

Fluidity of oil, that is its viscosity, should correspond to requirements for application in this engine. Thus it is necessary to remember two criteria:

  • Oil should not be too viscous as the starter should be able turn the cold engine, and places where in the engine oil gets, should be greased immediately after start-up of the cold engine.
  • Oil should not be too liquid because at high temperatures and turns of the engine the greasing film can become torn.

The schedule shows the recommendations of Audi/Volkswagen concerning viscosity of oil:

And – the all-weather oils which are meeting the requirements of a standard 50101;
In – oils with the good antifrictional properties, meeting the requirements norms 500 00;
With – the seasonal oils which are meeting the requirements of API norms of SF or SG.
The given indicators of temperature should be understood as long. Short-term fluctuations do not play any role.

Classes on SAE

The American Society of Automotive Engineers distributed oils on classes according to their viscosity.

Seasonal oil

These classes begin at engine oils with liquid winter (winter) of SAE 5W, 10W, 15W oil through an intermediate step of SAE 20W/20 to viscous summer SAE 30, 40 and 50 oils.

Seasonal oil was the cheapest engine oil earlier. For faultless greasing of the engine in it viscous or liquid seasonal oil should be filled in according to a season. Seasonal oil cannot be found today on fillings or in supermarkets, but it still is often applied in vehicle fleets. In Audi 80 it suits application (and such is opinion of the producer) only as makeshift in a desperate situation.

All-weather oil

Production of all-weather oil applied today is more difficult, and consequently all-weather oil respectively more expensive, than seasonal. As an additive improving an index of viscosity, 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 temperature in – 15°C to a viscosity class 15W, and at 100°C – to a class 50.

At all-weather oils on the basis of mineral oils that fact is problematic that the chains of molecules improving viscosity, decay over time and in this case oil becomes not such steady against temperature influences. For this reason of Audi does not allow to apply in the cars all-weather oils of the classes SAE 10W-30 and 10W-40 in a warm season.