When I ran on the water yesterday evening. ( for 3 hrs . Water temp of 140 ish ) It was chilly and I did not have my engine hatch back on the boat . I now have quite a bit on milky sludge built up on the tall aluminum valve covers. Is condensation normal like this??? I just had valve cover breathers pushed in and was not using a pcv valve on both sides. My oil level did not rise and no water on dip stick. The condensation did build up enough to run down the return holes in the heads and rest on the lifter valley. After mixing with oil, milky oil would come up the push rods .