I hate to get picky here, but if Warren is bottling it, then they are blending or "manufacturing" it for Peak or Old World Industries. It's not like it is blended by Peak somewhere in their non-existant oil-blending facility and then shipped by bulk to WPP to be bottled. As far as "manufacturing" oil, most blenders buy all the components from suppliers and then build/blend each oil formula from those components.
So, at best, the oil is "manufactured" by WPP-a contract blender- to Peak's requirements. This is my current understanding. Someone please tell me if I am way off here.