How to Distinguish Between Full Synthetic and Semi-Synthetic Engine Oil?

[JourneyLynn]

Distinguishing between full synthetic and semi-synthetic engine oil can be done by checking for the presence of mineral oil. Semi-synthetic oil contains a small amount of mineral oil, while full synthetic oil does not contain any mineral oil components. Engine oil, also known as motor lubricant, is composed of base oil and additives. The base oil is the main component of lubricating oil, determining its basic properties, while additives compensate for and improve any deficiencies in the base oil's performance. The functions of engine oil are: 1. To facilitate sliding between the piston and cylinder, and between the main shaft and bearing bush, preventing wear on parts; 2. To assist in cooling and temperature reduction; 3. To clean carbon deposits and sludge from engine components; 4. To seal and prevent leaks, stopping gas leakage and the entry of external contaminants; 5. To prevent rust and corrosion; 6. To absorb shocks and cushion impacts.