Refining Is Now the Real Oil Constraint as Russian Runs Fall to a 24-Year Low

Global oil markets have shifted their pressure point. Crude availability is no longer the tightest link in the chain. The ability to turn that crude into diesel, jet fuel and gasoline has become the binding constraint, and the shortfall is now measured in refining capacity rather than in barrels of oil produced.

Commodity intelligence firm Kpler set out the case in an analysis published on 23 July 2026, arguing that spare refining capacity has narrowed to a point where the market has almost no cushion left to absorb another outage. United States refiners have been running at roughly 95 percent utilisation. European plants have posted their strongest seasonal rates in several years. Refiners in Asia excluding China, in Latin America and in Africa have already pushed throughput close to practical limits, drawn by exceptional margins. That leaves the burden of any incremental supply on three regions where the limits are political and military rather than economic: Russia, China and the Gulf.

Russia is the clearest case, and the situation there has kept deteriorating since the Kpler note was published. Refinery runs fell to about 3.6 million barrels per day in July 2026, the weakest reading since May 2002 according to figures from Energy Aspects reported on 3 August. That is roughly a third below the seasonal norm of 5.3 million to 5.6 million barrels per day recorded between 2020 and 2025. Eighteen Russian refineries were hit during July alone, beating the previous monthly record of seventeen set in May. Kpler counted at least 25 refineries affected by drone strikes since August 2025, with damage spread across crude distillation units, catalytic crackers, hydrocrackers, reformers, hydrotreaters, storage tanks and pipelines.

The consequences inside Russia are now visible at the pump. Moscow banned gasoline exports from April 2026, extended restrictions on jet fuel through 30 November 2026, then imposed a full diesel export ban on 8 July 2026 that closed the loophole allowing producers to keep selling abroad. Russia, historically one of the world's largest diesel exporters, has started importing fuel from Belarus and Kazakhstan. Rationing has been introduced in more than twenty regions. On 31 July 2026 a drone strike started fires at the Lukoil Volgogradneftepererabotka refinery in Volgograd, a plant with an annual capacity above 15 million tonnes that produces gasoline, diesel, aviation fuel, fuel oil and bitumen. Within days the Volgograd region reimposed a 40 litre per vehicle purchase cap at Lukoil and Gazprom stations. The same site had already been forced offline by a strike in late May.

The second constraint sits in the Gulf. The disruption around the Strait of Hormuz that began in early March 2026 collapsed vessel traffic from a February daily average of about 135 transits to single digits within days. Crude flows have recovered faster than product flows. Kpler data showed Gulf crude exports averaging around 4 million barrels per day in June while refined product exports ran at roughly 1 million barrels per day, about a quarter of pre-conflict levels. The International Energy Agency estimates that close to 3 million barrels per day of regional refining capacity has been shut by attacks or by the absence of viable crude supply, against Gulf product exports of 3.3 million barrels per day in 2025. Traffic has picked up unevenly through late July and early August as United States naval escorts moved cargoes out of the strait, but loadings remain volatile and Kpler expects Middle Eastern product exports to need another three to four months to normalise.

The third constraint is in China. China holds ample idle refining capacity but continues to manage exports through a quota system. Beijing issued 19 million tonnes of clean product quotas in the first batch for 2026 and a second batch of 13 million tonnes in June, bringing the year to date total to 32 million tonnes, only marginally above the equivalent point in 2025. Export margins have been extremely attractive, yet the volumes released have not tracked them. Analysts now rank the quota policy alongside Russian capacity losses as a driver of global product tightness, and Beijing has given no sign of a policy reversal.

The combined effect shows up in refining margins. Crack spreads reached a record of roughly 70 dollars per barrel in July 2026, above the peak of the 2022 energy crisis. Diesel cracks have settled above 90 dollars per barrel at times, an all time high. High margins are usually read as a sign of refiner health, but at these levels they are a stress indicator: the market is paying an extraordinary premium to convert crude into usable fuel because finished product supply cannot keep up. United States refiners produced around 17 million barrels of fuel per week in late July 2026, the highest weekly output since September 2019, and it has still not been enough to fill the gap.

The structural picture makes a quick fix unlikely. Seven major refinery closures and conversions in the United States since 2019 removed roughly 1.2 million barrels per day of processing capacity. The IEA estimated that permanent closures combined with war damage cut global refinery output by about 4.5 million barrels per day, or 5.4 percent, in the second quarter of 2026. Product inventories at the main pricing hubs of the United States Gulf Coast, Singapore, Fujairah and Amsterdam Rotterdam Antwerp remain low, which removes the usual buffer against a further outage.

Kpler's base case has global refinery runs rising from about 81.5 million barrels per day in the third quarter of 2026 to 84.5 million in the fourth, but transportation fuel balances stay in deficit through much of the second half of the year. For buyers of diesel and jet fuel, that means procurement risk is now concentrated downstream. Freight operators, airlines, agriculture, mining and construction face elevated and volatile fuel costs into the northern hemisphere winter of 2026 and 2027, with the trajectory depending on whether Gulf shipping stabilises, whether Russian repairs outpace the strikes, and whether Beijing loosens its export quotas.