I just changed the oil on a friends 2011 Chevy Traverse and the oil looked OK when I drained it but when I pulled the fill cap off, this is what I found. This is also the filter off it with 7k miles on the filter and AMSOIL OE 5w-30 oil. The OLM was down to 32%. I sent a sample off to Blackstone. The residue on the back side of the filter where the oil enters looks nasty and I have never seen it like this before. I'm pretty sure there is a coolant leak into the engine. Going to get the report from Blackstone and have them head to the dealer to get this taken care of.