OSP: Saudi Aramco has cut May prices for light grades and kept Arab Medium and Heavy steady while ADNOC's price cut put March Murban OSP's premium to Dubai at the lowest in 18 months.

TRADES: Chinaoil sold a June Dubai partial to Glencore at $54 a barrel, the only trade on Platts window.

Reliance bought a supertanker full of Murban, or 2 million barrels, last month, sweeping up supplies on lower demand in North Asia, a trader said.