The Blessing of Oil

In the Roman ritual. According to Fr. Mark:

Apart from the Holy Oils (Sacred Chrism, Oil of the Sick, and Oil of Catechumens) sanctified by the Bishop at the Mass of Chrism in Holy Week, the Church, in the Roman Ritual, provides for the blessing of ordinary olive oil as a sacramental. This oil may be burned before the Blessed Sacrament or before sacred images and then used by the faithful in the same way as they would use any other blessed sacramental. Such devotional anointings accompanied by prayer are not to be confused with the Sacrament of the Anointing of the Sick, any more than one would confuse the use of Holy Water with the water of Baptism.

Devout Use of Blessed Oil

The Holy Man of Tours, Monsieur Dupont, used to anoint visitors to the oratory in his home with oil taken from the lamp that burned perpetually before his image of the Holy Face. Blessed -- and soon to be Saint -- Brother André Bessette of Saint Joseph's Oratory in Montréal used to recommend the devout use of oil taken from the lamp that burned before his statue of Saint Joseph. In Rome, to this day, one can obtain oil blessed in honour of the Santo Bambino Gesù at the Church of Santa Maria in Aracoeli.

The rite for blessing of oil (found in Father Weller's incomparable edition of the Roman Ritual) describes the benefits sought by the faithful in making use of this ancient sacramental of the Church.