Thanks! That will start me in the right direction. The motor has 1 gallon of cool power 15% through it. I'm encouraged that the color of the oil could be caused by a loose muffler. I found it loose last night I was told by a couple people that it was metal from overheating my engine. I found that the screw and nut on the front and back of the pipe needed to be tightened. That screw was sure corroded when I pulled it from the pipe. Also, I replaced the tubing from the stopper to the clunk. It's thicker tubing though. Sounds like I should replace it all just to be safe.