Does this look like water contamination and copper spray for head gaskets? I just replaced a cylinder head and gasket on a LS3 and after 100mi of driving I checked the oil and founds this. Oil pressure is stil good and car has not overheated. I did use copper spray on the gasket. Im going to recheck the torque on the head bolts and keep an eye on coolant levels. Also I had the oil pan off the block so I dont know if it can be residual coolant from when I did the head. Seems like too much. OIl was Mobil 1 0w40 btw.