Engine oil turns black over time due to several factors that naturally occur during the engine's operation. Here are the main reasons:
Combustion Byproducts: When fuel is burned in the engine, it produces soot and other contaminants. These byproducts can get mixed with the oil, causing it to darken over time.
Heat Degradation: Engine oil is exposed to high temperatures while the engine runs. This heat can break down the oil's chemical structure, making it less effective at lubricating and leading to a dark color.
Oxidation: Oxygen in the air reacts with engine oil during combustion and through contact with engine parts. Over time, this leads to the formation of deposits that darken the oil.
Contaminants and Dirt: Tiny metal particles from engine wear, dust from the air, and other contaminants can also mix with the oil, contributing to its blackened appearance.
Detergents in Oil: Modern engine oils contain additives, such as detergents, to clean engine parts. As the oil captures dirt and impurities, it naturally darkens, indicating that it’s working as intended.
While black oil doesn't always mean it's ineffective, it's important to follow your vehicle’s maintenance schedule to avoid engine damage from degraded oil. #changeoil #engine #motul