Hi Diemaster
The oil being catched in the can is from oil blowby.
Blowby is oil vapors that come from inside the engines crankcase.
They are casued by compresion leaking past the compresion rings (usually 2) on the pistons.
Some engines will create a little blow by even when new depending upon the surface of the cylinder bore and the finish and material of the rings.
Unless allowed to escape , blowby will presureize the crankcase causing oil to leak through or break gaskets, so they must vent them somehow.
In the old days blowby was just allowed to escape via a vent tube from the block , but then they discovered that it wasnt too good for the environment and it allowed the oil to drip on the roads , which isnt good either.
So then they designed PCV , ?postive crankcase ventialtion?.
The PCV system allows this airborn oil to be consumbed in the combustion chamber.
If an engine doesnt a normal amount of blowby it is no problem for the engine to consume, in fact , a little oil may lubricate the upper cylinder area and improve engine and valve life.
If you are getting a lot of oil in your can , then it is likely that you have engine wear problems.
|