omigod its "THE BLOB"
"Does 1/2 cup of oil turn into 5x as much? " Great visual! No, the olive oil can't expand to take over the world. Sometimes I've noticed incompletely digested oil turns the bm's alittle oily, so perhaps there is some of that, but I've never seen or heard of it to the extent you're seeing it.
http://www.flipsidemovies.com/blob.html
The Blob A-
Year Released: 1958
MPAA Rating: Not Rated
Director: Irvin S. Yeaworth Jr.
Writers: Theodore Simonson, Kate Phillips
Cast: Steve McQueen, Aneta Corsaut, Earl Rowe, Olin Howlin, Stephen Chase, John Benson, George Karas, Elbert Smith.
"Doctor, nothing will stop it!"
--Kate, the nurse (Lee Payton), The Blob
Upon finding a meteorite in the woods in the middle of the night, an old man (Olin Howlin) does what any one of us would do if we stumbled upon a steaming meteorite from outer space. He pokes it with a stick. It opens up to reveal a mound of gelatinous goop, which attaches itself to the old man's stick and starts dripping down towards his hand. Before it reaches his hand, he turns the stick over -- but the goop starts to climb upward and it devours his hand. The old guy starts screaming and hollering and, oh man, does it look painful.
What a cool movie. You've got Steve McQueen giving an enthusiastic, likable performance (though nobody will ever buy him as a teenager), pacing that keeps things moving along very nicely, and that big blob of red-colored goo wobbling around and consuming people ("I don't know what it is, but it's swallowed the old man completely!"). The blob even invades a midnight horror movie and sends hordes of teenagers screaming into the night. How cool is that?