BP has reached a significant agreement to sell a 65% stake in its Castrol lubricants unit to the U.S. investment firm Stonepeak for $6 billion. The deal, which values the Castrol business at approximately $10 billion, comes as BP aims to reduce its debt levels following a tumultuous financial year. This strategic move allows BP to cash in on its lubricants unit while investors react positively, with shares of Castrol India experiencing a nearly 9% surge following the announcement. The sale reflects a broader shift within the global lubricants market and positions Stonepeak as a major player in the sector.