Why Does Engine Oil Increase and Emulsify?

[MacAlejandro]

Reasons for engine oil increase and emulsification: 1. Oil increase: When the engine frequently operates under low-temperature and low-speed conditions, the oil temperature doesn't rise sufficiently. Water and gasoline mixed in the oil fail to evaporate, accumulating over time and causing the oil level to rise. 2. Oil emulsification: The essence of oil emulsification is the mixing of water and oil, resulting in a white emulsion. Causes of oil emulsification include water vapor in the crankcase condensing into water and seeping into the oil under low temperatures, and ethanol gasoline's tendency to absorb moisture, bringing water from the air into the engine cylinders. When a car operates for extended periods under low-temperature and low-speed conditions, water cannot evaporate and remains trapped in the oil, leading to emulsification issues when mixed together.