Oman Refinery Output Falls 6.8%: Diesel and Polypropylene Buyers Face Structural Shortfall as Jet and Aromatics Exports Surge

Petroleum product traders buying Omani diesel, LPG, and polypropylene on term contracts face supply shortfalls of material scale starting now: Oman's refinery output fell 6.8% in the first five months of 2026 to 89.9 million barrels, down from 96.5 million barrels in the same period of 2025 a reduction of 6.6 million barrels across five months, or roughly 44,000 barrels per day of refined product that is no longer reaching buyers. The decline is not uniform. Diesel output dropped 8.1% to 29.9 million barrels; M91 regular petrol fell 7.8% to 6.81 million barrels; LPG slid 5.8%. Against that, jet fuel production rose 5.5% to 11.7 million barrels, benzene output climbed 11.9% to 83,100 metric tonnes, and paraxylene (PX) production reached 272,000 metric tonnes with exports up 8.8% to 275,400 metric tonnes. What looks like a mixed picture is, on closer inspection, a product slate that is being reshaped either deliberately or by structural constraint toward higher-margin export channels and away from fuel volumes that have faced softer domestic demand inside Oman.

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The central uncertainty embedded in this data is whether the volume decline reflects a mechanical cause planned maintenance shutdowns at Oman's two main refineries, Sohar and Mina Al Fahal or a feedstock constraint driven by OPEC+ quota compliance. Crude feedstock is the raw oil fed into a refinery; if Oman is running less crude through its refineries to comply with OPEC+ production targets (the group's coordinated output limits designed to support global oil prices), then the product output reduction is structural and will persist for as long as those quotas remain binding. A 6.8% output reduction over five months without a publicly identified mechanical cause is a material signal. For term contract buyers buyers locked into regular, pre-agreed supply arrangements the distinction between a temporary maintenance driven dip and a quota driven structural reduction determines whether replacement supply should be sourced now or whether current gaps will self-correct within weeks.

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The diesel picture is where contract exposure is most acute. Oman's Sohar refinery produces a middle distillate the refinery industry's term for diesel and related products, occupying the middle of the crude barrel between lighter fuels like petrol and heavier products like fuel oil that flows primarily to South Asia and East Africa on short-haul tanker routes. Consider a regional South Asian fuel importer holding a term contract for 30,000 metric tonnes of Omani diesel per month. At current Middle East diesel spot prices of approximately $90–92/MT CFR (cost and freight the seller's price inclusive of shipping to the buyer's port), that monthly cargo is worth roughly $2.7 million. If Omani export volumes are being rationed Oman's diesel exports also fell alongside production that buyer faces either a spot market purchase or diversion to alternative Middle Eastern or Indian origin supply. Indian refiners have been aggressive exporters; however, Indian export policy has oscillated with domestic demand, and spot availability is not guaranteed. The cost difference between a contracted Omani cargo and a spot replacement from an Indian or Saudi refinery can run $4–7/MT, adding $120,000–210,000 to a single 30,000 tonne cargo's cost.

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On the sell side, the margin anatomy tells a more complicated story. Omani exporters and the trading arms of the national oil sector are not uniformly losing. Jet fuel exports rose approximately 20.2% to 9.71 million barrels over five months an incremental 1.6 million barrels reaching export markets. Jet fuel (aviation turbine fuel, or ATF) commands a premium over diesel in most Asian markets, and a shift of refinery output toward jet whether by deliberate configuration or as a consequence of running different crude grades captures more margin per barrel. Similarly, benzene exports of 80,500 metric tonnes and PX exports of 275,400 metric tonnes are flowing to Asian petrochemical hubs, primarily South Korea, China, and India, where demand from plastics and synthetic fibre production underpins firm spot prices. For intermediaries and cargo traders handling these aromatic flows, the Oman export price versus Asian CFR spot arbitrage the price gap that makes it profitable to ship product from Oman to Asia should be actively evaluated; 80,500 tonnes of benzene is large enough in a single origin to influence CFR Asia pricing if Omani offers are priced aggressively below the prevailing benchmark.

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The polypropylene contraction is a separate and sharper problem. Polypropylene (PP) a thermoplastic polymer produced from propylene, used in packaging, automotive parts, and textiles saw Omani export volumes collapse 29.8%, from approximately 109,800 metric tonnes in the first five months of 2025 to 77,100 metric tonnes in 2026: a reduction of roughly 33,000 metric tonnes. For a large integrated trader like a Middle East focused polymers desk at a major commodity house Trafigura, ITOCHU, or a national petrochemical trading arm 33,000 metric tonnes is a manageable gap, covered through swap agreements with Saudi Aramco's SABIC, or through spot purchases on the Asian PP market priced off the CFR China benchmark. The cost of that swap, at current PP spreads, might add $20–40/MT on replacement volumes, or $660,000–1.3 million over the five-month shortfall. For a smaller regional distributor in South Asia or East Africa who holds a bilateral contract for Omani PP as their primary source, the options are narrower: approach Indian producers such as Reliance Industries or HPCL-Mittal, or accept spot market exposure without hedging instruments. Domestic PP sales inside Oman rose 15.3% suggesting that production is being redirected inward, not lost which is cold comfort for export buyers.

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The product slate reorientation at the Omani refinery level more jet, more aromatics, less diesel, less PP exports reflects the second-order effect of a system optimising toward value over volume. Refineries have genuine operational flexibility in how they configure crude runs and secondary unit outputs; a fluid catalytic cracking unit (FCC the refinery component that cracks heavier feedstocks into lighter, higher-value products like propylene and petrol) can be adjusted to favour different outputs depending on relative product prices. If Omani refinery operators are responding to global jet fuel strength, Asian aromatics demand, and softer regional diesel margins, the current output mix is not an aberration it is a signal of where the economics are pointing. Buyers of diesel and polypropylene on Omani supply should treat the five-month trend as a structural reorientation until proven otherwise, not as a temporary disruption pending a return to prior volumes.

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The specific, time-bound signal observers should track is the Sohar refinery crude intake figure, which appears in Oman's monthly National Centre for Statistics and Information (NCSI) commodity report, typically released six to eight weeks after the reference month. If July and August 2026 crude intake at Sohar shows continued suppression below 2025 levels, the quota-driven structural constraint thesis is confirmed, and term buyers of Omani diesel and polypropylene should activate replacement sourcing before Q4 2026 contract negotiations. Simultaneously, watch the Platts Oman/Dubai crude differential the price gap between Oman crude and Dubai crude used as the benchmark for Middle East pricing for any widening that might indicate feedstock cost pressure on Omani refiners independent of OPEC+ targets. Jet fuel traders and aromatics desk operators, by contrast, should monitor CFR South Korea benzene and PX assessments on ICIS and Platts for signs that incremental Omani export volume is beginning to pressure spot prices in those destination markets that compression would be the signal that the arbitrage window is narrowing and that forward coverage should be secured now.