I don't think that's necessarily true. From what other people have said, there are large quantities of oil spreading underneath the surface of the ocean. While

I don't think that's necessarily true. From what other people have said, there are large quantities of oil spreading underneath the surface of the ocean. While some parts of the oil may be lighter than salt water, I think (disclaimer: no background in the subject whatsoever) that a good portion of the oil is actually heaver. I bet there is huuuuge pressure behind the oil spewing out.