U.S. Diesel Hits Four-Year High as Hormuz Traffic Stays Half-Disrupted
U.S. diesel hit a four-year high of $5.78 a gallon on September 3, with ING estimating Hormuz traffic at 50% disrupted and seaborne diesel down roughly a fifth.
Diesel at U.S. pumps averaged $5.78 per gallon on Thursday (2026-09-03), the highest since 2022. NBC News reported the figure is up 53% since the conflict with Iran began in late February, as refineries running near capacity added to the product supply squeeze alongside surging crude.4
Crude oil's August performance set the foundation. ICE Brent crude front-month averaged $88.1 per barrel through the month, and NYMEX WTI crude front-month $82.4, with both up 4.9% and 4.6% month-on-month respectively. Brent pushed further in September. NBC News reported it was up roughly 20% from early August as crude touched $97 per barrel in the days before the weekend. Markets closed Saturday (2026-09-05) with ICE Brent crude front-month at $94.97 per barrel and NYMEX WTI crude front-month at $91.22 per barrel.5,4
The Strait of Hormuz is the central supply constraint. Before the conflict, roughly 20% of the world's daily oil supply transited the waterway. ING estimated on Thursday (2026-09-03) that traffic disruption stood at approximately 50%. J.P. Morgan Commodities Research, in a report to Rigzone on July 20 (2026-07-20), noted that a traffic recovery begun in early June had abruptly stalled.4,1
The diesel market's seaborne exposure runs deeper than crude benchmarks alone capture. Analysts cited by NBC News estimated combined disruptions amount to roughly 20% of global seaborne diesel trade, with flows constrained since late February.4
U.S. crude inventory data through late August told a mixed story. The American Petroleum Institute estimated crude stocks fell 2.6 million barrels in the week ending August 28 (2026-08-28). That reversed a 4.2 million barrel build from the previous week. Over twenty weeks, commercial crude inventories excluding the Strategic Petroleum Reserve shed just over 48 million barrels, according to API data.3
SPR releases have cushioned part of the drawdown. Another 3.1 million barrels left the reserve in the week ending August 28 (2026-08-28), reducing total SPR holdings to 286.6 million barrels, some 445 million barrels below maximum capacity.3
But EIA data from the week ending August 21 (2026-08-21) showed commercial crude stocks nearly unchanged, rising just 100,000 barrels to 428.9 million barrels and keeping inventories 1% above the five-year average. Gasoline stocks declined over the same period.2
The supply agencies see the production gap extending through the year. The IEA forecasts global oil supply will fall by approximately 4.3 million barrels per day year-on-year in 2026, leaving a third-quarter shortfall of 1.8 million barrels per day. The EIA projects a steeper 5.3 million barrel per day year-on-year supply reduction in 2026, with its third-quarter gap at 3.84 million barrels per day.5
India has held domestic retail prices fixed through the crude rally. Petrol and diesel were kept unchanged on Thursday (2026-08-27). The last revision came on May 25 (2026-05-25), when petrol rose ₹2.70 per litre and diesel ₹2.80 per litre.5
As of Saturday (2026-09-05), NYMEX RBOB Gasoline front-month was at $3.20 per gallon and NYMEX Heating Oil front-month at $4.55 per gallon. Preliminary U.S. consumer sentiment rose to 54.4 from 49.5 in July, though Zaye Capital Markets CIO Naeem Aslam described the broader demand outlook as mixed.1
With the SPR at 286.6 million barrels and commercial stocks having shed more than 48 million barrels over twenty weeks, Washington's capacity to offset further physical supply losses through reserve draws is narrowing. J.P. Morgan flagged on July 20 (2026-07-20) that Hormuz recovery had stalled. Any renewed deterioration in flows arrives when that buffer is already diminished.3,1