Why is there smoke after changing the engine oil?

[McIan]

There are mainly three reasons: 1. Too much engine oil: It is recommended to check whether the oil level is between the upper and lower marks on the dipstick. 2. Engine oil leakage: Oil leakage can occur due to direct cylinder oiling, which indicates the need for a medium repair; or due to aging valve seals or other oil seals related to the cylinder that are not sealing tightly. 3. High oil viscosity: Before changing the oil, the viscosity of the oil is relatively high, so new oil is prone to leakage. Things to note when changing oil: 1. Choose good engine oil: Good engine oil can make the car more durable and powerful. Besides protecting the engine, good oil can also reduce the frequency of oil changes. 2. According to the engine requirements: The selection of engine oil should be based on the requirements of the engine. It is unnecessary to use overly advanced oil in engines with lower requirements, nor should lower-grade oil be used in engines with higher requirements.

[StOwen]

I just changed the oil and saw smoke coming from the car. As a new driver, I was really panicked when this happened! I went to ask my experienced driver friend and finally understood that it's usually because oil accidentally splashed onto the exhaust pipe or the hot surface of the engine during the oil change. These parts are very hot, so the oil droplets evaporate when they land, producing white smoke, which is normal and will dissipate after a few minutes of driving. However, if the smoke doesn’t stop or there’s a pungent smell, it might mean the oil wasn’t tightened properly or there’s a crack in the oil pan. I need to quickly check the dipstick to confirm the oil level is normal. Since then, every time I change the oil, I make sure to watch the mechanic wipe off any oil stains with a towel to avoid another scare. This experience reminded me that even though cars are convenient, the details are very important.