A couple weeks ago I bought a 05 colorado a week later I notice white goo under my oil cap. After research I found this could be condensation or a head gasket. Well I block tested for the head gasket that came back fine. I got the oil changed the other day. Now the goo is back and now it was on my dip stick before it wasn't it was just under the cap. Now the thing that's confusing me is that I'm not losing any coolant, truck is not over heating, no white smoke, just the white goo is the anything else that could cause this?