India's second-biggest state refiner had plans to shut a 120,000 bpd crude unit and some secondary units including a diesel hydro desulphuriser and a hydrogen generation unit for 20-25 days from the end of this month, they said.

Indian state refiners have not raised pump prices since Nov. 4 despite a surge in global oil and fuel prices.

Rising Asia complex refining margins are nudging companies to boost crude runs and gain from exports to recover some of the losses incurred for selling fuels in the local market.

BPCL did not respond to an email seeking comments.

Previously Indian Oil Corp, the country's top refiner, and Reliance Industries Ltd, operator of the world's biggest refining complex, had deferred maintenance shutdown of units.

(Reporting by Nidhi Verma, Editing by Louise Heavens)