BP has agreed to sell a 65% stake in its Castrol lubricants business to global investment firm Stonepeak for approximately $6 billion. The transaction values Castrol at $10.1 billion and is part of BP's broader divestment plan to reduce debt. BP will retain a 35% stake in a new joint venture and expects the deal to close by the end of 2026. The announcement led to a surge in Castrol India shares.