White smoke from the dipstick ???

Friends first greetings to everyone

When I remove the oil dipstick of the vehicle of 155 thousand km of 2010 model (when the engine is well overheated), there is a slight white smoke such as cigarette smoke . What could be the reason?
Although 1.4 HDI engine maintenance is done regularly, does it end in 150 thousand km ...?

If the white smoke weight comes slightly or lightly, if it looks like heavy cigarette smoke, the engine of the vehicle is certain that the vehicle wants is in my information for detailed information.

If it feels light like cigarette smoke, there is no problem it is already present in every diesel vehicle but if it blows like a train chimney then it can be a problem quickly, 150 thousand km nothing, at least 250 thousand goes that engine

If the cigarette smoke is light, there is no problem but it is dark

THERE IS NO DIFFERENCE, THAT LIGHT SMOKE IS NORMAL OIL STEAM O ...