According to this, that weird, dark tarry stuff isn't from the oil leak. While that would be great news if true, it's hard for me, at least, to shake the memory of what the Coast Guard said in the immediate wake of the explosion and sinking of the rig.
No, no leak here. We're good.
Sure you are.
I have no reason to doubt what they're saying now. Except they were so, so wrong the last time.