U6 Na Zhijie has been smoking white since the beginning.

It is normal, but it should be in winter or when the weather is cool. That's because when the ambient temperature is low, especially in winter, the exhaust pipe of the car will emit white smoke and drip. In fact, this is a very normal phenomenon. This is because gasoline burns completely to produce water and carbon dioxide. Water is steam at high temperature, and steam is colorless and transparent at high temperature. But when the temperature is lower than 100℃, water vapor will condense into water. If the condensed water droplets are small and suspended in the air, water vapor will appear as white gas. When the ambient temperature is low, the white smoke emitted from the exhaust pipe is water vapor. If condensed water drops accumulate, they become water. The water droplets discharged from the exhaust pipe are the result of condensation of water vapor generated after gasoline combustion in the exhaust pipe and muffler. However, when the ambient temperature is high, the water vapor has been discharged without condensation. When the ambient temperature is low, the water vapor will condense on the exhaust pipe wall and flow out with the exhaust gas. This phenomenon is common in cars with good engine working conditions.