Is Black Engine Oil Normal?
2 Answers
Black engine oil is not normal. The characteristics indicating the need for an oil change are: 1. Check the oil viscosity - if there is no viscosity, the oil needs to be changed; 2. The oil color turns black; 3. Excessive black particles, metal shavings, or carbon deposits in the oil; 4. Whether the smell of the oil is correct. The functions of engine oil: 1. Reduce friction and damage between moving parts; 2. Absorb heat generated in the engine combustion chamber and piston top, cooling the engine and protecting it from overheating; 3. Prevent pollutants and oxide impurities produced during combustion from adhering to the engine interior, keeping it clean; 4. Neutralize acidic substances produced by combustion gases, preventing engine rust and corrosion.
I find it quite common for engine oil to turn black, especially after driving for a while—say, a few months or covering six to seven thousand kilometers. The black color is mainly due to the accumulation of dirt inside the engine, much like how a kitchen rag gets dirty over time. As long as you change the oil regularly—recommended every five to ten thousand kilometers as per the owner’s manual—there’s no need to worry too much. The oil’s job is to trap dust and combustion residues, so turning black indicates it’s doing its job. However, if it turns as black as ink or has a burnt smell shortly after a change, it might indicate severe engine wear or improper maintenance, and you should get it checked immediately to avoid major engine repairs. I make it a habit to service my car every six months, ensuring smoother and safer drives. After all, the engine is the heart of the car, and it’s not something to take lightly.
