Holy Oil or what we call as Holy Anointing Oil is made usung Biblical & Sacred Plants from the Bible - used for protection and cleansing mentioned in the Hebrew Bible, Exodus. 
It says so in the Bible that it gives a sense of safety and elevation from the decay of the world. The oil we used in making this is Olive Oil for this is also what was mentioned in the Bible as this is the belief of the ancient Israelites. 
This oil has also been especially prayed for its uses and effictiveness from certain chapters in the Bible. I highly recommend this oil for any of purification and protection. You could never go wrong with this one... what makes this special is the prayer made for this oil. 
I suggest you anoint the soles of your feet, your hands, chakra points, forehead and top of your head as you put your intention for safety, purification and protection. You can also do a personal prayer once you do so, or use Psalms 91 or 23. Use a white candle if you feel like using it for candle protection and blessing magick. This oil can also be used in anointing holy and sacred items that you personally used to ensure they are purified and protected.