Well, I had about 1400 miles on an oil change, and had been wanting to try Rotella T 15W40, so we got the tools together and changed my oil this afternoon. I didn't have my camera, as usual, and couldn't get a pic, but the tip of my magnetic oil drain plug had what appeared to be a black tarry sludge on the top of the magnet, but not anywhere else. The oil looked thin and black, but did not smell burned. Anyone got an idea of what this might be? I couldn't really see any metal in the sludge, but was interesting it was only on the magnet part of the plug. The other thing that was unusual this go around is the fact I used about half a quart in that 1400 miles and have never used that much before, altho, I have been riding it a bit harder than usual, because I love hearing the new exhaust. Just thought I would throw this out there and see if anyone else has had this happen.