Hormuz Crude Recovers, Then Attacks Return as Diesel Bottleneck Binds

Gulf producers had resumed crude transit through the Strait of Hormuz by October 5, 2026, just as a new wave of attacks on vessels around the waterway threatened to stall the recovery. The sequence matters. Physical barrels were moving again. Risk was repricing at the same time.

Saudi crude shipments through the Strait climbed from around 1.4 million barrels a day in late August to around 4.1 million barrels, according to Wall Street Journal reporting on October 5. The return to the Strait came alongside continued use of bypass routes. In September, roughly 40% of the Middle East's crude oil exports bypassed Hormuz, compared with about 17% before the war, according to Wall Street Journal reporting on October 1. Analysts put total Middle East crude exports back at prewar levels.

Strait flows and bypass capacity

Iran's ability to choke off oil flowing through Hormuz is breaking down, weakening its leverage in talks with the U.S., the Wall Street Journal reported on September 28. That assessment followed weeks of uncertainty about actual liftings. Commercial ship trackers could not verify the high volumes passing through Hormuz claimed by the Trump administration, the Wall Street Journal reported on August 24. AIS gaps, dark transits and loadings outside the Strait complicated verification.

The September data resolved part of that dispute. More barrels moved. More barrels avoided the chokepoint entirely. Gulf producers resumed transit through Hormuz by October 5, according to Reuters. Then attacks on shipping resurged, putting that recovery at risk, according to Wall Street Journal reporting on October 5. Traders now face two variables. Throughput and war-risk tolerance.

Crude pricing reflected the oscillation. Oil prices fell about 2% on September 25 amid hopes for a truce between the United States and Iran, according to Reuters. Reports in early October that China had halted fuel exports coincided with a 4% jump in oil prices, according to Reuters. Flat price remains sensitive to headline flow risk and product export policy.

Products take the strain

The binding constraint has shifted downstream. A severe shortage of refining capacity created bottlenecks across the energy market in early October, according to Reuters. Crude can clear Hormuz or bypass it. Conversion into gasoline and diesel cannot be rerouted as easily.

The distillate tightness was visible well before October. In July, gasoline and diesel markets signaled a fuel supply crunch despite relatively subdued crude oil prices, according to Reuters. That divergence between crude and products persisted into autumn.

Several outages and policy interventions compounded it. Ukrainian attacks on Russian oil refineries compounded the global diesel shortage in 2026, according to OilPrice. Russia, a top exporter of diesel, banned fuel exports through October 2026, contributing to tight global diesel inventories, according to Reuters. A possible U.S. ban on diesel exports was under discussion in late September, according to Reuters. Each measure kept more molecules domestic and thinned the spot market for middle distillates.

Chokepoint arithmetic

Hormuz sits between Oman and Iran, according to the EIA. The U.S. Energy Information Administration identifies it as the world's most important oil transit chokepoint, according to the EIA. Flow averaged 20 million barrels per day in 2024, or about 20% of global petroleum liquids, according to the EIA. Earlier baselines were slightly higher. Flow averaged 21 million barrels per day in both 2022 and 2018, or about 21% of global petroleum liquids consumption in each year.

Exposure is concentrated eastward. An estimated 89% of the crude oil and condensate that moved through Hormuz went to Asian markets in the first half of 2025, according to the EIA. Freight, insurance and refinery slate decisions in Asia absorb most of the disruption premium.

The broader context here is a market with two clearing mechanisms. One is Hormuz transit and bypass utilization. The other is secondary logistics: refinery runs, product export licenses, clean tanker availability. Crude recovery alone does not clear product shorts. Product shorts can lift flat price even when wellhead supply looks adequate.

In my view, desks should separate the two risks. Strait risk is binary and headline driven. Attacks, truce talks, rerouting. Product risk is cumulative. Lost Russian runs, export bans, thin conversion capacity. The first moves volatility. The second sustains backwardation in distillates and supports refining margins while crude length rebuilds. Until conversion capacity normalizes, Middle East export volumes will tell only half the story.