now i have my couger running great, my and my buddy went to change the oil in his for the second time, he run it about 4 hrs on the oil that come it and changed it to 10w 30 and run it maybe 6 more hours so we was going to change it and it was milky, there has been some contact with water it wasnt broken down completly but a def. shade of grey to it any ideas

 

What do you mean it wasnt completely broken down? Is it water cooled?

 

ya its water cooled, it looked like it had got some water in but it want completly milky, just looks like it had a small amout of water if i had to quess

 

sounds like a blown headgasket!