What color of exhaust smoke is commonly observed during cold engine starts due to condensed fuel droplets?

During cold engine starts, white exhaust smoke is commonly observed because it indicates the presence of condensed fuel droplets that have not yet fully vaporized. When an engine is cold, the combustion chamber temperature is lower, making it difficult for the fuel to completely vaporize. This leads to incomplete combustion, and as a result, unburned fuel can mix with the air in the exhaust system. The moisture in the exhaust, combined with these unburned fuel droplets, creates the visible white smoke.

Furthermore, as the engine warms up, this issue typically resolves itself, and the exhaust smoke will clear up as the fuel vaporizes properly and combusts efficiently. This is a normal characteristic of engine behavior during cold startup conditions. Other smoke colors, such as blue or black, might indicate different issues, such as oil burning or excessive fuel combustion, which are not typical of a cold start scenario.