I have a renault clio and in the tap of the oil box it takes

[ektor]

I have a renault clio and in the tap of the oil box it takes out something dirty and i dont know why?thank you

[myglaren]

Looks rather like a head gasket failure.
It could be condensation if you are doing very short trips in cold weather.
Check the cooling system reservoir for oil in the coolant, which would be confirmation of a blown head gasket.

[Homer]

If that is the only symptom then it is probably just condensation.

If you have oil in the water or the engine overheats easily then I'd suspect a head gasket failure.

[Lighty]

This is not uncommon on the little Clio engines, it will happen a lot less if you flush the oil and replace it with a synthetic 5/30, it could be the head gasket, but don't jump to this conclusion straight away, this condensation is quite common in cold weather and with short trips.

[myglaren]

Most probably condensation as you say.
I had mistakenly thought that ektor was from south America but it does seem to be rather on the cool side where he actually lives.

[Northern_Mike]

My ex girlfriend's Clio looked like that every time I checked/changed the oil. I just put it down to condensation and nearly exclusive town use. Never lost any coolant.