I went to test drive a boat last weekend and it was a cold 38 degrees. Everything was looking on the up and up with the boat until I checked the oil cap and there was milky oil on it. The salesman said it ws just condensation form the extreme cold water passing through the water jackets, I did check the dip stick and it didn't look like any milky oil was on it, but the oil was brand new also. What are your thoughts