Oil gain???

[PaulSmith]

Did you pre-fill the oil filter? (And remember to let it stand so the oil could soak into the media) If not, you might have had an air pocket that took a while to clear. As for the oil going black, just do another oil change, they are quick and cheap. A clean and healthy engine should start to darken the oil after ~1000 miles, much faster then that and either the engine isn't clean or it isn't healthy.