The density of engine oil is approximately 0.91kg×10 cubic meters. Below is an introduction to the classification and functions of engine oil. Classification of engine oil: Automotive engine oil is divided into three types: mineral oil, semi-synthetic oil, and fully synthetic oil. Mineral oil is the most basic and cheapest type of engine oil, generally classified as SJ or below, and is only suitable for low-end cars or some new vehicles. Semi-synthetic oil is a blend of conventional oil and synthetic base oil, typically suitable for mid-range non-turbocharged models. Fully synthetic oil has excellent resistance to high-temperature volatilization and deposits, making it suitable for high-temperature, high-speed, and high-compression ratio engines, such as turbocharged engines. Functions of engine oil: Lubrication to reduce wear: Between the piston and cylinder of the engine, as well as between the main shaft and bearings, there is rapid relative sliding, which can easily cause wear. High-quality engine oil can form a sufficiently thick oil film between these sliding surfaces, separating the relatively sliding parts to achieve the goal of reducing wear. Cooling: Engine oil can carry heat back to the oil tank and then dissipate it into the air, helping the radiator cool the engine. Cleaning: Good engine oil can circulate carbon deposits, sludge, and worn metal particles from engine components back to the oil tank, flushing away dirt generated on the working surfaces of the parts through the flow of the lubricating oil.
