I received a question from a reader and instead of including it my blogs concerning readers' questions I thought I would blog on it separately.
The reason why olive oil is the true all-purpose oil is because it is the oil most mentioned in the bible. In fact, the first reference to it is in Genesis 35:14.
And Jacob set up a pillar in the place where he talked with him, even a pillar of stone: and he poured a drink offering thereon, and he poured oil thereon.
Now, olive oil isn't specifically mentioned but this is the oil that scholars believe that Jacob used. In fact, olive oil is only mentioned like 6 or 7 times in the bible but there are almost 150 versus which probably refer to olive oil being used.
So we use olive oil because it is a biblical oil and because it is easily obtained and relatively inexpensive. Olive oil has a pleasing fragrance of it's own. Additionally olive oil basically is an oil of peace and no further ingredients need be used when doing works for peace or a peaceful home. Olive oil can be used for any good work. Now, for enemy work I personally would recommend mineral oil. Mineral oil is the basic "all-purpose" oil for enemy work.