How to Tell if Engine Oil is Synthetic or Semi-Synthetic?

[VanFinn]

To determine whether engine oil is synthetic or semi-synthetic, check the bottle label: Full synthetic oil will be clearly labeled as "full synthetic" on the bottle, while semi-synthetic oil will be marked as "synthetic type" or "synthetic technology." Engine oil, also known as motor oil or engine lubricant, is a substance enhanced with additives in base oil, primarily containing anti-wear additives, detergents, dispersants, and multi-grade viscosity index improvers. The main functions of engine oil are to reduce friction and wear on moving parts, remove sludge and varnish from the engine, neutralize acids produced by fuel and lubricant oxidation, improve piston ring sealing, and cool the engine by carrying away heat from moving components.