The valuation of the Castrol business is estimated at $6bn–8bn, as noted by investment banking firm Panmure Liberum. Saudi Aramco is exploring whether to bid for part or all of

Saudi Aramco is considering a potential offer for BP's Castrol lubricant business, which could be worth as much as ~$10B.

BP has been exploring all options around its Castrol business, including a possible sale, as part of a strategic review. The business would be expected to be worth around $6 billion to $8 billion, Ashley Kelty, an analyst at Panmure Liberum, said in a note last week.

Saudi Aramco, the world’s largest energy company, is evaluating the possibility of acquiring part or all of BP’s lubricant business, which operates under the Castrol brand, Bloomberg reported.