Audi experts tell you, how to judge whether the oil is broken?
1、 Observe through oil color
On a sunny day, observe the oil drop with contrast sunlight; in the light, it is good to see clearly that the lubricating oil has no debris, and it can be used continuously. If there are too many debris, replace the lubricating oil.
Good oil is translucent yellowish brown, brown in water, milky white with foam, and the engine has been running for some time. The black color of oil is usually caused by too much oil and iron, or too much carbon particles in the oil. Pull out the oil scale to the bright place and observe whether the scale line is clear. When the oil on the oil scale cannot see the scale line, it means that the oil is too dirty and needs to be replaced immediately.
Conditional users can choose slow qualitative test paper, the price is between 9-11 yuan (100 pieces / box), and one test paper is needed for each oil inspection, that is to say, the material cost for each inspection is about 10 cents.
Observe the oil flow
Slowly pour the oil in the measuring cup into another empty cup and observe its flow. The oil flow of high quality oil products shall be long, uniform and continuous. The bad oil is a drop of oil.
3、 Manual grinding
Put the oil between the thumb and index finger and twist it. It should have lubricating effect. If there is no wear debris, there will be no friction. If you think the friction between the fingers is large, it means there are iron debris, oil and impurities in the oil.
Smell and choice
Generally, the oil with strong smell stimulation and peculiar smell is poor oil. Good oil should have no special smell, only slight fragrance.