If only there was something that would let you choose how sharp the shifts are, whenever you want AND you didnt have to pay for it... Ah wait, that's a manual
PCV , Positive crankcase ventilation. this device vents excess gasses that build up in your crankcase from blow by and rotational forces. releasing the vapour into the inlet to get burnt during the combustion process with it out of the inlet , it wont hurt other than leave a small film of oil in the surrounding area