when i say black, i mean like old trucks. i noticed this first time when i was following a linea mjd on hiway before i purchased mine, but i then thought it was due to his lack of maintainance. i noticed it even in my linea during a trip i made with my friends to goa where i was driving my friends car following my linea. it starts exactly when the turbo starts kicking in. does any one else face this problem????:?::?: if it was a little less like what comes from a swift or a verna i wouldnt mind. but what im talking about is quite questionable. is there any cure for it, i mean its a bs4 complaint engine, it shouldnt smoke so much rite???