what is engine oil and type motor oil

Engine oil, engine oil, or commonly known as Lubricating oil or engine oil consists of two important parts. Basic oil And additives Lubrication oil has the function of reducing the friction of objects that are abrasive. Engine cooling Glaze the gap between the skin. Clean soot and Metal scrap inside the engine Prevents corrosion from rust and acids. And prevent compression Of the engine leaks, etc. Oil production The source of the base oil used to make it. The machine has three sources: 1. Oil extracted from plants. 2. Oil extracted from crude oil. 3. synthetic oil This oil provides the best quality of engine oil. 4. Lubricant Lube Oil, Lubricating Oil The products obtained from the refining of crude oil have a boiling range of 380-500 ° C and various additives. In small amounts To improve the properties of each lubricant such as viscosity by thin membrane. Or cream The lubricant is coated between the surface of the two parts, most of which is a piece. The metal parts are moving past. To prevent direct friction. Meanwhile Help clean And cooling By boosting the engine by up to 30 percent. Usually mixed with anti-rust agent. And corrosion Oil production 1. Standard of the Association of Automotive Engineers (SAE) to determine the viscosity (lubricity) of the engine oil. The greater the value, the more viscous. The oil is divided into two major grades (monograde) is the oil with a single viscosity, such as SAE 40 means that at a temperature of 100 degrees Celsius, the viscosity is 40. Multigrade is the oil. The viscosity of two values, such as SAE 20W-50 means that at -25 degrees Celsius oil viscosity is at 20, but when the temperature reaches 100 degrees Celsius. The change in viscosity is No. 50. The letter "W" indicates that the viscosity is a winter grade (measured at -25 ° C). If not, it is a summer grade (measured at 100 ° C). 2. The American Petroleum Institute (API) specifies the type of engine. And engine protection capabilities. For the gasoline engines use the letter "S" (spark ignition), for example, SA SC SD SE SF SG SH SI SJ. The diesel engine uses the letter "C" (compress ignition), such as CD CB ... CF4. Sometimes we see both "S" And "C", such as SG / CH4. This oil is suitable for use with gasoline engines. But it can be used in diesel engines in the short term or CH4 / SG is the same with the case above is suitable for use with diesel engines. But it can be used in gasoline engines in the short term.