What does it mean when a sedan emits white smoke?

[McHeidi]

There are two scenarios when a sedan emits white smoke: normal and abnormal: 1. Normal situation: The white smoke is water vapor. After gasoline burns, it forms water and carbon dioxide. When the ambient temperature is high, it appears as water vapor; 2. When the ambient temperature is low, the water vapor condenses into water droplets on the exhaust pipe wall, indicating that the gasoline is burning completely; 3. Abnormal situation: The gasoline contains water. If the gasoline has a high water content, it will emit white smoke. Some low-quality gasoline contains more impurities, which can clog the fuel filter over time and damage the engine. Therefore, it is crucial not to use low-quality gasoline.