That's what I thought, so I left my car running for over a year with oil pissing out the BOV and pouring down the induction pipes.
It turns out the oil had been leaking past a bearing in one of the turbos and in this situation, there's no smoke. (I don't know too much engines, so I'm only repeating the information and advice I was given.) The longer you run a car in this state, the more damage you will be doing. I had to have the head stripped. When I first told people on here, they all said I was being led astray, but after seeing the pictures, most people agreed that this was the right thing to do.
I'm not saying it's all bad. I'm just saying that you should probably get a professional to take a look earlier rather than later...
(The upside is that this gave me an excuse to go hybrids!!)