Replacement of operating fluids and lubricants (Audi 100 C3)

Engine oil should be changed after 15,000 km of mileage for petrol engines and after 7,500 km for diesel engines. A new car should have its oil changed after the break-in period is over (in 1500 km). When changing the oil, be sure to also replace the oil filter.

It is recommended to fill the engine crankcase with oil of the same brand as was in the engine. If another brand of oil is used, the engine lubrication system should first be flushed with oil of the brand that will be poured into the engine. To do this, drain the old oil, pour in new oil 2–4 mm above the min mark on the oil level indicator (dipstick). Start the engine and let it idle for about 10 minutes. Then drain the oil, change the filter element of the oil filter and pour in fresh oil.

Check the coolant density once a year and add G11V8A concentrate if necessary. If it is not possible to add concentrate, it is recommended to change the coolant once every 2 years. It should be borne in mind that the coolant is poisonous, so do not suck the liquid in with your mouth when pouring. When working with coolant, it is recommended to use safety glasses, not to smoke or eat in the workplace. If the liquid gets on exposed skin, wash it with soap and water.

The gearbox oil should be changed after 90,000 km. After 15,000 km, the gearbox oil level should be checked and, if necessary, topped up to the norm. The gearbox oil level should reach the filler plug hole. The brake fluid in the clutch drive and brake drive should be changed once every 2 years. It is recommended to carry out this operation in the spring, simultaneously with the next maintenance. The brake and clutch drives use FMVSS 116 DOT 4 brake fluid. The brake fluid is hygroscopic, so it is stored only in a closed container.