All comments welcome.
An interesting question. I would not refer to Holy Oil specifically as a weapon because it's primary purpose is containment. It is a tool, but like salt and or a devil's trap is not an offensive weapon on its own. I would call the shotguns loaded with salt weapons, but would not add the weapons template to salt itself. In the same manner, Holy Oil must be made into a weapon, i.e. Castiel's Molotov cocktail, and Holy Oil has only been used in this manner on one occasion. This may be a matter of semantics, but I would leave the template off. --MisterGlass 13:44, July 24th 2010