Are engine oil and machine oil the same thing?

Engine oil, that is, engine lubricating oil, is known as the "blood" of the car. It can lubricate, clean, cool, seal, and reduce wear on the engine. This is a well-known fact. “"Mechanical oil" is an old name, now it is called "total loss system oil". Since there are many types of mechanical equipment and their functions are also different, there are many types of lubricants required. The most commonly used and representative lubricants are: The first type is gasoline engine oil and diesel engine oil. Gasoline oil is used in various gasoline cars and gasoline engines ； Diesel engine oil is used in diesel cars, tractors, diesel locomotives, etc. The main functions of this type of lubricating oil are lubrication and cooling. The second category is mechanical oil (including high-speed mechanical oil). Machinery oil and heavy machinery oil are mainly used in textiles, sewing machines and preparation lathes. Its main function is also to lubricate. The third category is compressor oil, turbine oil, refrigeration oil and cylinder oil. They are used in compressors, steam turbines, and refrigerators respectively, while cylinder oil is used in steam locomotives and cylinders that are in direct contact with steam. Mainly plays a sealing role. The fourth category is gear oil. It is divided into industrial gear oil and automobile and tractor rotating gear oil. Industrial gear oil is mainly used in various types of industrial machinery, such as rotary furnaces, rolling mills and other gear transmission mechanisms. Gear oils for automobiles and tractors are used in their gearboxes, reduction gearboxes and other components as well as the hyperbolic gear transmissions of luxury cars and off-road vehicles. The main quality requirements for this type of lubricating oil are lubricity and anti-wear properties. At the same time, in order to ensure that cars and tractors can start at low temperatures, they should also have a lower freezing point. The fifth category is hydraulic oil, which is mainly used as the transmission medium for various types of hydraulic machinery, such as automobile transmission mechanisms, mining machinery, etc., which all require hydraulic oil. The sixth category is electrical oils, including transformer oil, cable oil, etc. Mainly used for preparing electrical equipment. This type of oil does not require lubricating properties, but does require electrical properties. Since the raw materials and production processes of this type of oil are similar to other types of lubricating oils, they are usually included in the lubricating oil category. It can be seen from this that there are many different lubricants, each of which has specialized uses and special requirements. Therefore, they generally cannot be used interchangeably. See the table below for a comparison of new and old brands of commonly used total loss system oils (machine oils). http://jpkc.ycit.cn/jxcjjp/kcnr/3/3.2.htm References: http://baike.baidu.com/view/379.htm