Camu, respectfully, you need to run the white flag up on this one. You're absolutely incorrect. If you'd like to see for yourself, try this little science experiment. Take some standard Dex ATF, which is a fairly light weight fluid and
colored red and mix it in a glass with some heavy, amber motor oil (a straight 60wt racing oil would make the point best, but I suppose a 15w-40 or 20w-50 would do as well). Mix 'em up and wait. By your theory, pretty soon you'll see red ATF sitting on top of brown motor oil. Of course, if you try this, you'll never actually see this, because these two oils will mix and never separate. They are miscible (the word I'd forgotten before
) and will not "unmisc" (a word that has never existed before...).
EDIT: Oh yeah, the reason oil and water separate the way they do is that oil and water are NOT miscible. It's about their molecular structure. The various oils, however, are again miscible. Look it up, google it, etc, and you'll see.
Time to back away gracefully and quietly and not further associate your user name with the incorrect argument you've made.