Gilbert Deya is also fleecing church-goers with cash-for-miracles scams.
The 63-year-old, who refers to himself as the Archbishop of Peckham, was caught selling the £1.99 product from Aldi for £4.99 as a cure for disease when used on food.
According to The Sun, who carried out an undercover investigation, Deya claimed to have anointed the oil while his associate handed out leaflets detailing his "mystical powers".
Journalists working for the newspaper posed for two months as a husband and his cancer-hit wife to investigate the church.
