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Four major misunderstandings about the use of automotive lubricants

By, CoolMotor

• 2024-04-18
• 2 View

Automotive lubricants are used very frequently during maintenance. In addition to protecting the engine and reducing the number of oil changes, high-quality lubricants can also save gasoline expenses. During this season, you should also be careful not to cause car breakdowns due to improper use of lubricants. "Improper" usage methods generally stem from four "misunderstandings" of lubricants by car owners.

Four major misunderstandings about the use of automotive lubricants

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

Misunderstanding 1: Lubricating oil is often replenished and does not need to be changed

It is correct to check the lubricating oil frequently, but only replenishing it without replacing it can only make up for the lack of oil quantity, but it 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 there will also be some consumption, reducing the quantity.

Misunderstanding 2: Additives are useful

A truly high-quality lubricant is a finished product with multiple engine protection functions. The formula contains a variety of additives, including anti-wear agents, and lubricants pay attention to the balance of the formula to ensure the full play of various properties. Adding other additives on your own will not only fail to bring additional protection to the vehicle, but will easily react with the chemicals in the engine oil, causing a decline in the overall performance of the engine oil.

Misunderstanding 3: When the lubricating oil turns black, it is time to change the oil

This understanding is not comprehensive. For lubricants without detergents and dispersants, the blackening of the color is indeed a sign that the oil has seriously deteriorated. However, lubricants used in modern cars generally contain detergents and dispersants. This kind of detergent washes off the film and black carbon deposits adhering to the piston and disperses it in the oil to reduce the formation of high-temperature sediments in the engine. Therefore, the color of the lubricating oil will easily turn black after being used for a period of time, but at this time The oil has not completely deteriorated.

Misunderstanding 4: Add as much lubricating oil as you can

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 escape from the gap between the cylinder and the piston into the combustion chamber and form carbon deposits. These carbon deposits will increase the engine compression ratio and increase the tendency of knocking; the carbon deposits in the red-hot state in the cylinder can easily cause pre-ignition. If they fall into the cylinder, they will increase the wear of the cylinder and piston, and also accelerate the contamination of the lubricating oil. Secondly, too much lubricating oil increases the stirring resistance of the crankshaft connecting rod and increases fuel consumption.