Global Diesel Crunch: Refineries at Full Capacity Still Can't Fill the GapWhy Could Export Bans Backfire?

Title context: Global Diesel Crunch: Refineries at Full Capacity Still Can't Fill the GapWhy Could Export Bans Backfire? Text: From disruptions in the Strait of Hormuz and attacks on Russian refineries to U.S. discussions of restricting diesel exports and India's expansion of refining capacity, the global diesel market is undergoing a crisis driven jointly by supply chains, industrial structure, and geopolitics. What makes this crisis unusual is that refinery profits are at high levels, refineries still in operation are near or at full capacity, yet diesel prices have been pushed above $200 per barrel, with cracking spreads once reaching $100 per barrel. High prices have not quickly brought new supply; instead, they have begun transmitting into gasoline, jet fuel, chemical feedstocks, freight costs, and core inflation. What the market lacks is not crude oil underground, but middle distillates that can be refined into diesel and delivered to terminals on time via available shipping routes. I. What Is Missing Is Not Crude Oil, but Deliverable Diesel Diesel, along with jet fuel and heating oil, belongs to the same molecule pool produced by refineries and is widely used in trucks, trains, ships, agriculture and construction machinery, generators, and residential heating. Compared with gasoline, diesel has higher energy density and is more difficult to replace through short-term electrification, so its demand is highly tied to industrial production, freight, and agricultural activity. Estimates from industry experts suggest that the global refining system normally processes about 85 million barrels per day of crude oil, and there is currently an operating shortfall of 4 million to 5 million barrels per day, accounting for 5% to 6% of normal throughput. Roughly half of the shortfall is in the Middle East, due to disruptions in the Strait of Hormuz and damage to some refineries; the other half is in Russia, mainly related to Ukrainian drone attacks on refineries. Based on diesel accounting for about 40% of refinery output, the corresponding diesel supply gap is about 1.5 million barrels per day, and it mainly needs to be covered by the seaborne market. The problem is that the global seaborne diesel market is about 8 million barrels per day. A gap of 1.5 million barrels is equivalent to nearly 19% of seaborne diesel supply being withdrawn. Other refineries still in operation are already near full capacity, and the market does not have a "spare capacity pool" that can be quickly opened. Prices can reward existing capacity, but they cannot repair damaged units within weeks, nor can they immediately reopen blocked shipping routes. This explains why refining profits are at record highs while diesel supply remains tight. The United States' supply position makes this gap easier to amplify. The "Energy and Chemicals Strategy Daily" published by CITIC Futures on September 24, citing Kpler data, said that in August 2026 U.S. diesel exports accounted for 26.7% of global diesel exports; the same report showed that in the week ending September 18, U.S. diesel exports were about 1.331 million barrels per day. Another publicly available media report, on a monthly basis, said U.S. diesel exports were about 1.6 million barrels per day in August and about 1 million barrels per day in February. The statistical timing and denominators in different materials are not exactly the same, but they point to the same fact: the United States is an important marginal supplier in the global diesel market, and any change in export policy is not merely a U.S. domestic issue. II. A $100-Per-Barrel Cracking Spread Shows the Scarcity Premium Is in Refined Products To observe the diesel market, one cannot look only at Brent crude oil prices; one must also look at the cracking spread. The cracking spread is the price of refined products minus the price of crude oil, reflecting how much value is added after a barrel of crude oil is processed into diesel. When the diesel market is weak, the cracking spread is about $8 to $10 per barrel; under normal supply and demand, about $20; when the market is strong, about $25 to $30; the diesel crisis triggered by the Russia-Ukraine conflict in 2022 briefly reached $60 to $70. The current crude oil price is about $100 per barrel, and the nominal diesel price has exceeded $200 per barrel, corresponding to a cracking spread of about $100 per barrel. This level shows that the scarcity premium is mainly concentrated in middle distillates, rather than evenly distributed across the entire crude oil industrial chain. What downstream users pay includes not only the cost of crude oil, but also refinery processing capacity, inventory location, shipping schedules, and geopolitical risk. Singapore 10ppm diesel, ICE diesel, and U.S. Gulf Coast low-sulfur diesel cracking spreads rose sharply in 2026, with multiple regions rising to around $80 to $100 per barrel. Prices in different regions cannot be mechanically compared, but the trend is very clear: the tightness of refined products has exceeded simple crude oil price fluctuations. (Diesel cracking spreads in major global regions. Image source: CITIC Futures) High cracking spreads should stimulate refineries to increase production, but diesel is not a commodity for which a separate production line can simply be opened. Its scarcity precisely exposes the structural constraints of the refining industry. III. Refineries' "Diesel Maximization" Cannot Create More Diesel When a refinery is built, its product yields are determined according to crude type, unit configuration, and regional demand. During operation, the proportions of gasoline, diesel, jet fuel, and other distillates can be fine-tuned within a range of a few percentage points, but it is difficult to quickly convert a refinery mainly oriented toward gasoline or jet fuel into a pure diesel unit. More importantly, industry surveys show that currently operable refineries are already near 100% full capacity. If the product structure is to be changed substantially, multi-year, capital-intensive unit modifications are required, which cannot be completed in the short term. Therefore, what refineries can often do is only "diesel maximization": taking more diesel out of a given total output and less gasoline, jet fuel, or light chemical feedstock. The CITIC Futures daily report pointed out that after diesel strengthened in September, U.S. refineries shifted to diesel-maximization production, gasoline supply contracted, and the gasoline cracking spread also became unusually strong. After gasoline prices rose, aromatics cost and supply pressures emerged accordingly. The report also judged that refineries' all-out effort to raise refined product output would squeeze light chemical feedstock production and further suppress the supply of olefins and other chemicals. Similar transmission has also appeared in the domestic market: high overseas diesel cracking spreads and increased refined product exports have pushed refineries to raise diesel yield, with more coking units switching production, thereby diverting asphalt supply. This is a market in which "products compete for feedstock." The stronger diesel is, the more willing refineries are to sacrifice part of other products to increase diesel yield; but after gasoline and chemical feedstocks decrease, gasoline, aromatics, and olefin prices are pushed higher again. Diesel strength thus spreads along the refinery product structure to the entire energy and chemicals chain. IV. A U.S. Export Ban: A Short-Term Political Remedy, a Second Shock to the Global Market Discussion of restricting U.S. diesel exports comes against the backdrop of high domestic diesel prices and rising cost pressure on agricultural states and truck drivers. For political decision-makers, restricting exports looks very direct: keep more diesel in the United States and push down U.S. spot and futures prices. But refining structure and inventory constraints determine that this policy is likely to first bring expectations of lower prices, then lower production and a contraction in refined product supply. Gulf Coast refineries produce about 5.3 million barrels per day of distillates, while total U.S. daily demand is about 3.6 million barrels, leaving about 1.7 million barrels that need to be exported. U.S. storage tanks and pipeline capacity are insufficient to absorb this surplus over the long term. Once diesel cannot be exported, inventories will rise rapidly, and refineries will have no choice but to reduce crude runs. EIA data show that in the week ending September 18, U.S. distillate inventories were about 107.4 million barrels, 12% below the five-year average. Autumn maintenance and harvest-season demand will also increase simultaneously, so the inventory buffer is not ample. CITIC Futures, citing EIA data, said that in the week ending September 18, U.S. refinery utilization fell seasonally to 94% from 96.8% the previous week, and net crude exports fell by 369,000 barrels per day; after utilization declined, U.S. gasoline and diesel inventories re-entered a drawdown state. This shows that the U.S. domestic balance itself is already very tight, and if export policy swings sharply, inventories and refinery runs will reflect the shock faster than export volumes alone. S&P scenario estimates show that if exports were fully restricted, about 1.5 million barrels per day of diesel would be trapped in the United States, and refineries might cut crude processing by nearly 1.9 million barrels per day, with utilization falling to 80% to 82%. This is not simply "diesel staying in the United States," but a decline in total refinery throughput. Because gasoline and jet fuel are co-products, U.S. domestic gasoline supply would also decrease, and ultimately diesel could be temporarily cheaper while gasoline becomes more expensive. This is precisely the economic reason some U.S. energy officials and refining industry figures oppose a full ban. The policy discussion itself is already changing cross-regional prices. U.S. diesel futures once fell more than 7%, while European diesel futures jumped; CITIC Futures also judged that if the United States sharply reduced exports, U.S. domestic diesel would build inventories, but tightness in non-U.S. markets would intensify further. The United States does not need to formally sign a ban to create an external shock. As long as the market believes exports may decline, shipping schedules, inventories, and forward contracts will reprice first. The destinations of U.S. exports also illustrate the spillover risk. Kpler said that in 2025 the largest destination, Mexico, received about 220,000 barrels per day on average, accounting for about 17% of U.S. diesel exports; Chile's imports increased by about 15%, and Brazil's were about 103,000 barrels per day, more than doubling year on year. If the United States imposed a full embargo, source material estimates that global seaborne diesel supply could fall by another 30%. This is a scenario estimate, not a fact that has already occurred, but it reveals the second-order effects of U.S. policy: the United States tries to push domestic shortage pressure back overseas, while overseas markets will transmit inflation back to the United States through higher prices, stockpiling, and alternative transportation. V. Diesel Is Entering U.S. Core Inflation, and AI Makes This Shock Harder to "See Through" Diesel prices are more likely than gasoline to become a macroeconomic problem because diesel is embedded in transportation and production, not just household travel. Trucks, railways, ships, agricultural machinery, construction equipment, and backup generators all need diesel. Some U.S. railway companies have said that truck diesel costs are too high and that they are increasing rail transport to replace road transport. But rail substitution cannot cover all short-distance delivery, agricultural machinery operations, and engineering construction scenarios. High prices have also not immediately brought a broad demand collapse. Historical experience shows that when diesel prices approach or reach $200 per barrel, some customers will delay purchases, reduce operations, or change transportation modes. Some regions globally are already showing clear signs of demand destruction, but other regions are still supported by subsidies, their own inventory buffers, and the short-term irreplaceability of diesel. In other words, demand is indeed adjusting, but not fast enough to offset the supply gap. Bloomberg data show that as of late September, average U.S. diesel prices had risen 83% year to date to $6.50 per gallon, while gasoline prices rose 59% over the same period. These two figures are in the U.S. retail price context and cannot be directly compared with international per-barrel diesel prices, but they show that the diesel shock has already passed from refineries and traders to end users. The warning from Torsten Slok, chief economist at Apollo Global, captures the macroeconomic difficulty of this crisis: higher diesel prices first raise freight, warehousing, construction, and agricultural costs, then transmit with a lag into goods and services prices, and may therefore enter core components beyond the CPI energy subindex. If the supply shock is only temporary, the Federal Reserve can wait for it to fade on its own; but if refinery damage, blocked shipping routes, and export restrictions persist for months, the traditional approach of "looking through an energy shock" will be challenged. Chicago Fed President Austan Goolsbee also issued a reminder about persistent supply shocks, showing that there is not no disagreement within the Fed on this issue. The AI boom adds another layer of resilience to diesel demand. Slok estimates that AI-related activity currently contributes about one percentage point to U.S. GDP growth, about half of current total growth; this estimate covers data center construction, energy demand, software spending, and wealth effects. Construction machinery, logistics, and backup power links in data center construction are relatively dependent on diesel equipment. Therefore, the stronger AI capital expenditure is, the less likely diesel demand is to fall back quickly; and the more expensive diesel is, the higher the construction and operating costs of data centers become. The energy shock thus forms a feedback loop with the growth theme: AI supports demand, diesel pushes up costs, and costs in turn increase uncertainty for monetary policy and valuations. VI. Russia Retreats, India Rises: Global Diesel Pricing Power Is Being Redistributed Supply disruptions do not only change prices; they also change who has export capacity. After attacks on Russian refineries, Moscow restricted most overseas diesel sales; European refining capacity has contracted, and Middle Eastern exports are affected by Strait of Hormuz risk. If the United States further restricts exports, traditional supply sources will contract simultaneously. India is filling part of the gap. Some media, citing Kpler, said that after Russian supply was restricted, India has this year surpassed Russia to become the second-largest seaborne diesel supplier after the United States, accounting for about 10% of global shipments. Indian Oil Minister Puri said India will not withdraw existing diesel export commitments, and cited a five-year supply agreement between Indian Oil Corporation and Mauritius as an example, emphasizing that long-term contracts and on-time delivery are themselves part of export capacity. India's advantage is not only current output, but also its expansion roadmap. India's refining capacity is about 267 million tons per year, the market expects it to approach 290 million tons within a year, and the target is to reach 320 million tons between 2030 and 2032. Investment talks between Saudi Aramco and Abu Dhabi National Oil Company and India's refining industry also show that Middle Eastern capital is viewing India as a downstream node serving Asia, Europe, and Africa. India is forming a supply chain route of "purchasing crude from restricted sources, refining locally, and selling refined products globally." On the one hand, it takes in discounted Russian crude; on the other, it uses its own refining and port capacity to export diesel. If U.S. exports are restricted and Europe continues to shut refineries, India's marginal pricing power will rise further. But India is not an immediately available 1.5 million-barrel-per-day substitute. New capacity requires crude oil, equipment, ships, insurance, and stable settlement channels; once the United States launches secondary sanctions, if any link in shipping insurance or dollar settlement is blocked, capacity does not equal deliverable supply. In addition, India's domestic fuel demand is still growing, and the government may also prioritize its own market when prices are high. Whether India can become a "stable seller in turbulent times" ultimately depends on whether capacity, diplomacy, finance, and shipping can operate simultaneously. VII. What the Market Should Watch Next Is Not a Single Oil Price Number Based on the current situation, the future market can roughly be divided into four scenarios. The first is geopolitical easing. Hormuz transit recovers, damaged Russian refineries are repaired, the United States continues exporting, inventories rebuild, diesel cracking spreads fall rapidly, and refinery profits and related asset valuations face compression. The second is limited policy intervention. The United States adopts voluntary export reductions, quotas, or phased measures; domestic prices receive short-term psychological support, but non-U.S. markets maintain high premiums, and policy reversals amplify volatility. The third is a full ban combined with unrecovered supply from the Middle East and Russia. The global seaborne diesel gap widens, gasoline, jet fuel, and chemicals come under simultaneous pressure, and prices ultimately find balance through demand destruction and economic slowdown. The fourth is that India and other Asian refineries gradually deliver on capacity expansion. Supply is redistributed in the medium term, regional spreads narrow, but transportation and policy risks keep the volatility center higher than in the past. For investors, the first clue is refinery profits, but one cannot look only at nominal cracking spreads. What really matters is whether companies can obtain crude oil, maintain high diesel yield, ship products to high-price markets, and allocate inventories when export policy changes. The second clue is logistics and trade links. The value of shipping schedules, insurance, ports, and regional inventories rises during supply disruptions, but these links are also the most vulnerable to sanctions and policy restrictions. The third clue is downstream profits. Whether trucking, agriculture, construction, chemicals, and asphalt companies can pass on costs will determine whether high diesel prices ultimately show up as inflation or turn into a demand collapse. The fourth clue is monetary policy. If diesel costs continue to enter core goods and services, pressure on interest rates and valuations may be broader than a simple energy stock rally. At least five indicators are most worth tracking in the future: Strait of Hormuz transit volumes and insurance rates; the recovery and export policy of damaged Russian refineries; U.S. distillate inventories, refinery utilization, and diesel export volumes; the actual delivery of India's diesel exports and newly added refining capacity; and whether diesel cracking spreads fall because supply recovers or because demand is crushed by high prices. The last distinction is especially critical: the former is an easing of the crisis, while the latter may be a precursor to recession. Conclusion The essence of the global diesel predicament is a deliverable fuel crisis after capacity, shipping routes, product structure, and policy all tightened simultaneously. Refineries already being at full capacity does not mean the market has no risk; rather, it means any new disruption will directly hit end users. A U.S. export ban can change the location of inventories, but it cannot create diesel out of thin air; India's capacity expansion can reshape medium-term supply, but it cannot fill the gap overnight. What this crisis truly tests is not which country can temporarily push down domestic prices, but whether the global energy system can restore stable middle distillate production, transportation, and delivery. As long as this chain is not repaired, diesel will continue to send the same signal through cracking spreads to gasoline, chemicals, freight, inflation, and interest rate markets: What the world lacks is not a barrel of crude oil, but a barrel of diesel that can arrive on time.