Can't remember who told me this now, but I was told that the reason why cars have their breather connected to the induction system is to suck air out of the crank case to stop the oil churning and frothing, not simply to collect the waste oil.
It may have been a mate of mine who works for Jaguar doing power train, so I'll try and mail him later to ask him - haven't seen him for a bit tho'.
Who ever it was they were horrified when they saw the breather box on my Speedster and talked me into putting a pipe fitting on my air cleaner and running the breather to that.
Since being told this I have noticed that every production car I have seen has the crank breather connected to the induction system in some way - must be a reason for it.
Bye
