Platts starts publishing Malaysia's Miri Light crude OSP differential from Sept 22, 2025

Platts, part of S&P Global Commodity Insights, has started publishing the official selling price differential of Malaysia's Miri Light crude set by state-owned Petronas from Sept. 22, 2025.

In addition, Platts will start publishing the outright OSP of Miri Light crude as calculated from the OSP differential set against Platts Dated Brent assessments from Nov. 2, 2025, once the whole month average of Platts Dated Brent assessments for October onwards is known.

The new OSP differential and OSP will be published alongside the existing Malaysian crude OSPs currently published on Platts Global Alert and Platts Crude Alert page 1062.

Petronas issues the Malaysia Crude Oil OSP Alpha one month in advance of loading, which represents all the crudes within the basket, namely Labuan, Miri Light, Kikeh and Kimanis. For example, in September, Petronas will issue OSP differentials for cargoes loading in October 2025. According to Petronas, Miri Light will continue to form part of the LMKK basket for the alpha despite the introduction of a differential for the grade.

Petronas also issues OSP differentials against the alpha for four other crude grades outside of the basket. Petronas then issues outright OSPs for all crude oil grades following the month of loading.

Platts publishes the OSPs issued by Petronas as soon as they are made available.

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