Holy oil is made up of either extra virgin olive oil, almond oil or jojoba oil.
To that, you had some drops of a pure essential oil. (And it has to be a pure oil, not synthetic.).
It can be any essential oil that we would deem sacred:
Usually Rose for the Celestial Mother
or Red Sandalwood, Ambergris, Musk, Honeysuckle, Benzoi, Verbena, Vanillin, Myrtle, Patchouli or Calamus.
Usually Frankincense for the Holy Daughter
or White Sandalwood, Camphor, Copal, Jasmine, Eucalyptus, Menthol or Rosemary.
The oil should be poured into a small brown glass bottle with a cap.
Shake the bottle so the oils can mix. Then, open it back up.
Trace the Fora over the aluminium foil cup shape or open bottle
1. Trace the vertical ray and then the horizontal ray followed by the clockwise circle over the centre point. Whilst saying: May this oil be blessed, in the Name of the Mother.
2. A 2nd time trace the vertical ray and then the horizontal ray followed by the clockwise circle over the centre point. Whilst saying: and of the Daughter.
3. A 3rd time trace the vertical ray and then the horizontal ray followed by the clockwise circle over the centre point. Whilst saying: and of the Great Mother.
Blessed is She.
4. Iot ‘E Voh. (The Sacred Name of Power, IHV by saying the E with the out breath, it is breathed rather than pronounced. It may also be pronounced Yot ‘E Voh.) 
 In The Coming Age Issue 1, Winter & Moura 1976: The Symbolism of The Sacred Names Article: “Iot ‘E Vo (IVH) is the primordial name of Deity. The symbolism of the letters represents in order the three Persons of the Trinity – Iot is always the first principle or primal urge, thus in its most sublime sense it is the unknowable Dark Mother – Absolute Deity, before time and before space, from Whom all manifestation proceeds. ‘E the aspirate or ‘breathing’ of the Ancient Greeks represents the breath or Spirit of Deity (in both Greek and Hebrew the word for breath and spirit is the same: Pneuma in Greek, Ruach in Hebrew); the [Celestial] Mother and Creator of the universe. Vo is the letter of [sacrifice] and as such it represents the Daughter.”