So, the 300th mile is almost here, and all good bulleteers know what that means. So,a coupla' questions. First, when I look down below, I see three hex head nuts. One all the way forward and to the right that I assume is the sump. The next about four inches and directly behind the first that I assume to be for the oil tank proper. Then a third (at the moment) mystery hex head all the way near the back and to the right ((when looking from below).Do I remove this too and what exactly is it? Also, Is it necessary to open the timing case to get all the oil out? And oh, this is for an '06 sixty-5. Thanks in advance, Chuck.