What are the classifications of automobile oil? What is the function of engine oil?

Lubricating oil is a name in a broad sense. Any oil that can lubricate mechanical parts can be called lubricating oil. Generally can be divided into solid lubricating oil (Huang Gan oil) and liquid lubricating oil (engine oil and gear oil). Its function is to reduce mechanical friction resistance. In other parts of the car, there are also special lubricants, but unlike engine oil, solid paste lubricants and liquid lubricants are mostly used, and there is no special grade and brand, as long as they can play the role of mechanical lubrication.

The main difference between engine oil and lubricating oil is that lubricating oil is a general term for all lubricating oils, while engine oil refers to mechanical lubricating oil, and in automobiles, it refers to lubricating oil used by engines. Because the load of diesel engine is higher than that of gasoline engine, special gasoline engine oil cannot be used instead of diesel engine oil, so as not to accelerate the wear and tear of diesel engine. Gasoline engines can use high-quality diesel engine oil, but gasoline engine oil and diesel engine oil should be used differently in principle.

Generally speaking, the substance that can reduce the relative motion resistance of two contact surfaces is called lubricant. Lubricants are divided into solid, liquid and gas. Lubricating oil belongs to liquid lubricant. Lubricating oil includes industrial lubricants and automobile lubricating oil, which is usually called petroleum lubricating oil. Lubricating oil is more widely used than engine oil. Lubricating oil is generally used for large mechanical equipment. Engine oil is generally used in automobile engines. Lubricating oil: liquid lubricant used in various types of machinery to reduce friction, protect machinery and processed parts, and mainly play the roles of lubrication, cooling, rust prevention, cleaning, sealing and buffering.

Lubricating oil is a liquid or semi-solid lubricant used to reduce friction and protect mechanical parts on various automobile machinery and equipment, which plays the role of lubrication, cooling and rust prevention. By using lubricating oil, two relatively moving objects can reduce friction. I think when we choose engine oil, we must check the oil specifications of mechanical equipment and add appropriate lubricating oil; The amount of oil added should also be appropriate, neither too much nor too little.