Most Americans actually buy peanut butter that doesn't need mixing, too... brands like JIF mix oils into the peanut butter which keep it from separating. "All

Most Americans actually buy peanut butter that doesn't need mixing, too... brands like JIF mix oils into the peanut butter which keep it from separating. "All natural peanut butter", which is what a lot of us like and what the OP is talking about in their article, is made with just peanuts blended, and the oil separates after a while on the shelf.