I don't know what made me think of this now before I tore into the engine, but I just went outside to check the oil out of curiosity. I got the oil changed just before leaving Albuquerque so I didn't think to check it. After only 600 miles or so, the oil is black and is below the second indentation on the dipstick. I see no leaks, no drips in the driveway, and it doesn't smoke. Where the hell could all the oil have gone?? This doesn't look good at all. I started it briefly and moved it from the street to the driveway, and I can hear a grinding noise from under it, but it wouldn't stay running long enough to pin point the sound. I'm getting a really bad feeling I've trashed a bearing in the bottom end somewhere. I really didn't need this right now. Just laid out the cash for a truck, and don't know how much more I can afford to put into this. Lift, tires and other bits are going to be a ways off now. Damn.