I need to send in a sample to be sure, but like I said before, visually it looks clean. Dipstick has the same consistency up and down and when draining the oil there is no water that comes out first. Also, if I was to leave the oil for 5-6k it could start to show. The oil was fairly fresh when I first noticed the issue. I have changed it a couple times since, due to doing the head gasket and now the oil cooler.