what does this mean?

 

Could be any of the following:

A. You have been driving your car on short trips in cool weather, resulting in a builtup of moisture in the oil cap.

B. Your PCV system is not functioning properly, causing blowby gasses and oil sludge to build up in your crankcase.

C. You have a blown head gasket. Check the dipstick and see if you have the same sludge like deposits on it as well.

 

Just don't turn your key buddy and take it to the nearest shop to check if its Blown head gasket/Cracked head/or even worse the block

peace

 

ok guys thanks. i did leave it for a week at a mechanic in which he never touched the car. it was cold and rainny. the dipstick was clean. also the coolant is green.

 

Your good to go.

 

I would just take it for a good long drive to boil the moisture out of the oil

 

What thermostat are you running?

As stated, start simple. PCV may not be working correctly, short trips, too cool a thermostat, etc. My wife's BMW will build some crud under the oil cap in the winter because she has a short drive to work.

 

change your oil and see what it looks like!

 

Thanks all it is just a simple fix will get pcv tomorrow. any particular?

 

You probably don't need anything except a good drive. Moisture in the oil cap is common. If the dipstick and and coolant look good then it's just condensation forming in the cap. Drive it and enjoy.