Hey friends, I have had oil leaking down through my intakes, through the plenums and soaking through both air filters continuing down to the ground. I am adding about 1 quart/2 days Castrol Syntec 5W30. When it is really cold there is occasional roughness and grey smoke during hard accelleration, other times she runs fine. SES code is on most of the time but disappears once in a while, Peake is reading codes 71 and 90, Bank 2 intake CPS and both exhaust CPS' are brand spankin' new. Problem has been going on for 3 weeks, daily driver and still driving daily. Search results have revealed about 4 strong possibilities, but I don't want to fix-by-error the car and would like your guys' opinion as to what is causing this, especially if you have had this problem or have mechanical experience. Thank you for your time!