Four misunderstandings in the daily use of lubricants

carlubricating oilThe frequency of use in maintenance is very high. In addition to protecting the engine and reducing the number of oil changes, high-quality lubricating oil can also save gasoline costs. In this season, we must also be careful not to cause car breakdowns due to improper use of lubricants. The "improper" use method generally stems from the four "misunderstandings" of car friends about lubricants.

In response to the following four "misunderstandings", the technicians of Great Wall Lubricant Car Maintenance Center gave professional explanations:

Misunderstanding 1: Add more lubricating oil

The amount of lubricating oil should be controlled between the upper and lower scale lines of the oil dipstick.Because too much lubricating oil will be from the cylinder andpistonEnter the combustion chamber into the gap and burn to form coke deposits. These coke deposits will increase the compression ratio of the engine and increase the tendency to produce knocks. The coke deposits are red hot in the cylinder and easily cause pre-ignition. If they fall into the cylinder, it will aggravate the wear of the cylinder and piston, and will also accelerate the pollution of the lubricating oil.Secondly, too much lubricating oil has increasedCrankshaftThe stirring resistance of the connecting rod increases fuel consumption.

Misunderstanding 2: When the lubricating oil turns black, it is time to change the oil

This understanding is not comprehensive. For lubricating oils that have not been added with a quiet dispersant, the darkening of the color is indeed a sign that the oil has been seriously deteriorated, but the lubricating oil used in modern cars is generally added with a quiet decomposer. This cleanser will wash off the rubber film and black carbon deposits adhering to the piston and disperse it in the oil to reduce the generation of high-temperature deposits in the engine. Therefore, the color of the lubricating oil is likely to turn black after a period of use, but at this time The oil has not completely deteriorated.

Misunderstanding 3: Lubricating oil is often added and not changed

It is correct to check the lubricating oil frequently, but only supplementing without replacing it can only make up for the lack of oil quantity, but cannot fully compensate for the loss of lubricating oil performance. During the use of lubricating oil, the quality will gradually decrease due to pollution, oxidation and other reasons, and at the same time there will be some consumption, which reduces the quantity.

Misunderstanding 4: Additives are useful

Really high-quality lubricants are finished products with a variety of engine protection functions. The formula already contains a variety of additives, including anti-wear agents, and the lubricants are most particular about the balance of the formula to ensure the full play of various performances. Adding other additives by oneself will not only not bring additional protection to the vehicle, but will easily react with the chemicals in the oil, resulting in a decline in the overall performance of the oil. (Dahe Net)