Misunderstanding 1: Add more lubricant. Many people have misunderstandings about lubricant quantity control, thinking that adding more lubricant is better. However, too much lubricating oil will enter the combustion chamber from the gap between the cylinder and piston, forming carbon deposits. These carbon deposits will increase the compression ratio of the engine, increase the tendency of knocking, and lead to increased engine wear.

Myth 2: Blackened engine oil means the engine oil has deteriorated. In fact, blackening of engine oil does not necessarily mean that the engine oil has deteriorated. This is because the clean dispersant added to the thickened engine oil disperses the sediment on the machine parts into the oil, causing the oil to turn black. Therefore, whether it has deteriorated or not, various indicators should be tested, and oil should be changed regularly according to quality to reduce unnecessary waste.

Misunderstanding 3: Blindly choosing lubricants. When selecting engine oil, you should pay attention to both the quality grade and the viscosity grade. Lubricant oils of different brands and levels cannot be mixed to avoid engine damage. In addition, it is not advisable for domestically produced cars to blindly use imported engine oil, because the engine oil must be better than domestic engine oil, which often outweighs the gain and has many disadvantages.