Hormuz Oil Traffic Plunges After Recovery as Tanker Costs Hit $1.4 Million

The Strait of Hormuz tanker network staged a substantial recovery in September, but it did not return to normal. Gulf crude exports reached 13.9 million barrels per day, more than 75% of prewar levels, before reported shipments through the strait fell to 2.9 million barrels per day on October 11. At the same time, the cited daily charter cost for a very large crude carrier reached $1.4 million.

That combination recovered monthly exports, a later daily plunge and exceptional freight costs captures the central engineering and logistics tension. The network can move large volumes through improvised arrangements, but its effective capacity now depends on more ships, more cargo handling, expensive risk premiums and crews operating under severe danger.

The International Energy Agency’s October Oil Market Report said Gulf crude exports increased by 4.4 million barrels per day to 13.9 million in September. Flows through Hormuz itself rose by 3.7 million barrels per day to 10.9 million, supported by ship-to-ship transfers in the Gulf of Oman. Bypass exports, including pipeline movements, increased by 970,000 barrels per day to 5.6 million.

A shuttle network restored capacity, but added handling

Part of the recovery came from a shuttle system pioneered by Abu Dhabi National Oil Company and subsequently adopted by Saudi Aramco. Tankers make comparatively short journeys through Hormuz and transfer crude to other vessels outside the Gulf for onward delivery. The system was expected to handle about 2.5 million barrels per day in September, up from 1.4 million in August.

This arrangement changes the transport problem rather than eliminating it. A conventional voyage allows one tanker to carry a cargo from its loading point toward the customer. A shuttle-and-transfer chain divides that task between vessels and adds another interface where schedules, suitable ships, weather, transfer equipment and receiving capacity must align. Each handoff consumes time and ties up tanker capacity even when the same quantity of oil ultimately reaches the market.

Pipelines and ports outside the strait provide another path, but those routes form a system with their own pumping, terminal and loading limits. Pipeline nameplate capacity alone does not determine export capacity; oil must also reach storage, pass through functioning terminals and find available ships. September’s recovery therefore represented the combined output of Hormuz crossings, offshore transfers and bypass infrastructure not restoration of one unrestricted route.

Daily tracking shows volatility, not a settled monthly reversal

The Financial Times reported that tracked Hormuz oil shipments dropped to 2.9 million barrels per day on October 11, compared with a September peak of 15.5 million. Daily vessel-tracking estimates can fluctuate sharply and should not be treated as final monthly totals. Cargoes may move in clusters, and different datasets can measure ship passages, loading events or cargo volumes rather than the same activity.

Even with that qualification, the October 11 reading matters as a measure of variability. A network that alternates between concentrated movements and very low-flow days creates planning problems downstream. Refiners need predictable crude grades and delivery windows, while tanker operators must coordinate ships whose daily charter costs have risen to extraordinary levels. Maritime historian Sal Mercogliano cited a rate of $1.4 million per day for a very large crude carrier; a separate reported fixture from the Gulf of Oman approached $1.2 million per day.

The human cost cannot be reduced to a freight-rate calculation. Tanker captains were reportedly offered salaries as high as $100,000 per month and bonuses of $50,000 for crossing the strait. At least 24 seafarers have died in attacks since the conflict began on February 28, according to International Maritime Organization figures cited by ABC. The U.S. Navy-led Joint Maritime Information Center continued to classify the threat to merchant shipping as severe.

Crude recovery has not solved the diesel shortage

The September crude rebound also masks a significant product imbalance. Middle Eastern refined-product and liquefied petroleum gas exports remained below half their prewar levels. The IEA reported September refined-product shipments of 1.9 million barrels per day, compared with 4.7 million before the conflict, while liquefied petroleum gas shipments reached 670,000 barrels per day against a prior level of 1.5 million.

That distinction has direct consequences for freight operators, agriculture, airlines and other fuel-dependent industries. Crude in transit is not interchangeable with diesel already produced and positioned near consumers. Refineries require suitable feedstock, operating capacity and time, while record freight and crude costs can erode refining margins outside advantaged regions.

Global observed oil inventories ended September 509 million barrels below their end-February level. The IEA said diesel markets were under extreme pressure and projected that constrained middle-distillate supplies could persist well into 2027. September proved that tanker shuttles, cargo transfers and bypass routes can recover millions of barrels per day. The October decline, depleted inventories and $1.4 million daily tanker cost show why recovered capacity is not the same as a stable supply system.

By Thomas Caldwell — AMI’s senior editor for mechanical and mobility engineering, covering vehicle electronics, systems integration, electrification, chassis systems, propulsion, and safety policy.