As with all other spiritual tools, the real power comes from God. Without faith, anointing oil will not have any positive effect. You can use oil to help strengthen and demonstrate your faith, but you cannot use it to replace faith. Anointed oil has been used for a wide variety of things historically.
Is anointing oil for healing?
Jesus was anointed near the end of his life (Matthew 26:6-13). In James 5:13-16 Christian leaders are called to anoint for healing. ... The only text that calls us to use anointing oil for healing is the text from James 5:13-16, and it is in that text that we learn where the power of anointing comes from.
What does the anointing oil do?
The primary purpose of anointing with the holy anointing oil was to sanctify, to set the anointed person or object apart as qodesh, or "holy" (Exodus 30:29).