SAE on engine oil stands for the abbreviation of the Society of Automotive Engineers, and the SAE grade represents the viscosity grade of the oil. Here are some relevant details about engine oil: 1. Types of engine oil: Engine oil refers to lubricants specifically used in internal combustion engines. In addition to lubrication, it also has functions such as cleaning, rust prevention, and cooling. 2. Composition of engine oil: The base oil of currently used engine oil is composed of hydrocarbons, poly-alpha-olefins (PAO), and poly-internal-olefins (PIO), all of which are organic compounds consisting solely of carbon and hydrogen. Some high-grade engine oils may contain up to 20% esters. 3. How to use engine oil: There are many types of engine oil available on the market. It is best not to mix two different brands of engine oil, as the additives used in different brands may vary, and mixing them could cause the oil to deteriorate. If mixing is necessary, a compatibility test should be conducted first. If the oils are compatible, they can be mixed, but the quality of the new oil will significantly decrease. 4. How to choose engine oil: It is generally difficult to distinguish the quality of engine oil based on appearance alone. Therefore, when purchasing engine oil, it is advisable to choose well-known brands of lubricants and buy from authorized dealers of reputable brands. The quality can be determined based on the API oil quality grade, and the packaging should clearly display the manufacturer's address, production date, and batch number.
