What's the reason for white smoke coming from the oil filler port?

[DiReese]

It may be due to damage to the engine's pistons, leading to oil burning and the emission of thick white exhaust, or excessive water content in the gasoline. Here are the relevant details: Specific reasons: Normal white smoke is caused by the exhaust gases from the tailpipe. When the temperature of these exhaust gases reaches a certain level, they condense into water droplets. If there is a significant amount of white smoke, it may indicate damage to the engine's pistons, resulting in oil burning and thick white exhaust, excessive water content in the gasoline, or a damaged seal in the water passage. Additional information: If there is only a small amount of smoke from the oil filler port, check if the exhaust is normal. If the exhaust is normal, then there is no issue. If there is sufficient oil and water but a large amount of smoke from the oil filler port and abnormal exhaust, it could indicate a problem with engine cooling or oil circulation.