Castrol is a brand of industrial and automotive lubricants which is applied to a large range of oils, greases and similar products for most lubrication applications. The Castrol brand is part of the BP's Group of Companies, but has retained its separate identity. n February 1899, Charles Cheers Wakefield resigned from the Vacuum Oil Company over a disagreement with the management regarding Vacuum Oil's foray into the railway lubricants sector, and set himself up as competition. The firm he left behind would go on to become Mobil Oil.