Updated September 28, 2026
● Weekly briefing · September 28, 2026 · Issue #43

Day 212 — a plan on paper, diesel at records

Executive summary

For the first time in this war, the argument over reopening the Strait of Hormuz has a written sequence. On 25 September Iran’s Foreign Minister presented a seven-day plan through intermediaries at the UN: fighting halts, the US lifts its naval blockade and oil sanctions and frozen assets are released, the strait reopens at the end of day seven, and nuclear talks follow. On 26 September President Trump said it “would not be acceptable”; by the weekend he was saying he expects more talks this week. None is scheduled, and Iran says it will not soften its terms. The gap is the order of events, not the destination: Washington wants the nuclear file inside the package, Tehran wants it after.

Nothing on the water moved with the diplomacy. Windward counted 6 commercial transits on 25 September and 13 on 26 September, against about 130 a day before the war, and GEF’s own satellite-AIS frames showed only Iran’s coastal traffic for five consecutive captures. Brent settled between $99.25 and $106.60 on the headlines and ended the week at $104.32, up 0.4%. WTI fell 7.9% to $92.41 as US crude stocks built.

The week’s durable fact is downstream. Diesel sat at or near all-time records in the United States ($6.5276 on 22 September), the United Kingdom (198.32p, 0.77p from its record) and Australia (up 18.9 cents in a week) while crude went nowhere. The crisis has become a refined-products crisis, and products are where the next policy fights — export bans, price caps, tax holidays — are happening.

The plan, and the refusal

The seven-day plan condenses the June memorandum that collapsed in July and defers the nuclear question. President Pezeshkian said Iran is “ready to strike a deal”; an Iranian official ruled out nuclear concessions. Secretary of State Rubio cautioned on 25 September against calling it a breakthrough, and on 26 September the President said it would not be acceptable and that Iran wants a deal “because they are losing so badly”. On 27 September he told Axios he expects US negotiators to talk to Iran again in the days ahead, while Foreign Minister Araghchi said the US ambassador to the UN “hasn’t read” the plan.

GEF reads this as the most specific proposal of the conflict and not yet a negotiation. The test is unchanged: an agreed sequence, then several consecutive days of rising independent transit counts, easing war-risk premiums in London, and loaded Qatari LNG carriers leaving the Gulf. None is visible. Hormuz stays CRITICAL.

The bypass restarts under fire

Saudi Arabia’s East–West pipeline, the main route around Hormuz, restarted on 22 September after an 11-day halt caused by drone strikes and is running at about 4m b/d against a 7m b/d maximum; full capacity is six to eight weeks away. Whether tankers are loading at Yanbu, its Red Sea terminal, is disputed: Reuters and Baird Maritime reported that loadings had not resumed as of 24–25 September, while OilPrice reports they resumed at reduced levels. GEF publishes it as unconfirmed.

The route is being defended rather than trusted. Saudi Arabia intercepted six Houthi missiles aimed at Taif and Yanbu on 24 September and two missiles and two drones aimed at Khamis Mushait and Riyadh on 26 September; France announced soldiers, radars and air-defence systems for Yanbu; the UN Security Council condemned the attacks. A pipeline built to avoid one chokepoint delivers into another: every barrel that leaves Yanbu for Asia or Europe must still pass Bab el-Mandeb or the Suez Canal. GEF’s 28 September frames show traffic back through the Bab el-Mandeb narrows and normal Suez convoys.

Products, not crude

The EIA week to 18 September showed the split in one table: US commercial crude built 3.0 million barrels to 426.4 million, about 2% above its five-year average, while distillate drew to 107.5 million, about 12% below. That is why AAA’s diesel average set a record on 22 September while Brent fell, and why Washington floated and then denied a 90-day diesel export ban on 23 September; the Energy Secretary is instead discussing voluntary limits with refiners.

The pattern repeats abroad. UK diesel reached 198.32p on 25 September and the RAC expects the 199.09p record of June 2022 to fall. Australian five-city diesel rose 18.9 cents to 286.8 c/L in a week, 110 cents above its pre-war level. European jet fuel averaged $207.57 a barrel in the week to 18 September. Russian diesel refining remains cut after Ukrainian strikes, with Perm and Novoshakhtinsk hit this week. None of these is a physical shortage; all of them are the same shortage of refined product, priced.

Europe: a borderline refill and a price-cap shortage

EU gas storage reached 70.87% on GEF’s direct GIE read for gas day 26 September. The refill pace dipped to about +0.10 points a day mid-week before recovering to +0.25; the 14-day average is +0.20 and the 7-day +0.18, against about +0.25 needed for the relaxed 80% target by 1 November. At those paces the EU lands at about 78.1% or 77.4% — short of 80%, inside the regulation’s flexibility band. GEF rates it BORDERLINE. Germany, at 57.02% on the 24 September country read, is the weak point.

A correction on the record. On 23 September GEF downgraded the gas trajectory to OFF PACE on a market report of about 69% that implied the pace had halved. The direct GIE read two days later showed it had not, and the verdict was restored to BORDERLINE with the error stated on every affected page. GEF also corrected an earlier statement that Yanbu was loading again. France’s forecourt shortage eased to 13% of stations short of at least one fuel on 27 September, from 16–17% on 21 September; its cause remains TotalEnergies’ price cap, not a missing barrel.

The shortage map, re-verified

On 26 September GEF re-checked every live pin on its shortage map against evidence dated on or after 12 September. Twenty of thirty survived: 4 at red (France, Cuba, Libya and Burundi, the last promoted on reports of queues and no fuel for generators) and 16 at watch. Canada and Australia aviation, Nepal and Myanmar moved to watch; ten pins were removed, including Hong Kong, whose Middle East route suspension is security-driven rather than fuel-driven. The map is smaller because the evidence rule was applied, not because the crisis eased: where fuel is physically missing today the causes are local — a price cap, a blockade-starved grid, smuggling, a foreign-exchange squeeze — and across most of the world the war now shows up at the pump rather than at empty stations.

Interconnections

Three links matter this week. First, diplomacy to products: a plan that reopened Hormuz would ease crude first and diesel last, because distillate stocks take months to rebuild; even the de-escalation case does not quickly relieve the US, UK or Australian forecourt. Second, the bypass to the next chokepoint: the East–West pipeline moves risk from Hormuz to Yanbu and Bab el-Mandeb, which is why a Houthi missile at a Saudi city now moves the oil price as surely as an incident in the strait. Third, gas to diesel: Europe’s borderline storage season and heating-oil demand from October compete with transport for the same middle distillates. A disruption at one node propagates through the system; this week it propagated furthest into the products people buy.

Risk assessment

Strait of Hormuz: CRITICAL (unchanged, stable). A written plan and a rejection; transits in the low teens against about 130 a day before the war.

Bab el-Mandeb / Red Sea: CRITICAL (unchanged). Houthi fire at Saudi cities and the Yanbu terminal; traffic back through the narrows on GEF’s frames.

Global diesel and distillate: CRITICAL (worsening). Records or near-records in the US, UK and Australia; US distillate 12% below its five-year average into heating season.

Saudi East–West bypass: ELEVATED (improving). Restarted at about 4m b/d; terminal loadings disputed; under active attack.

EU gas storage: ELEVATED (stable). 70.87%, borderline for 80%; Germany far behind.

European road fuel: ELEVATED (improving). France’s price-cap shortage easing to 13% of stations.

US Strategic Petroleum Reserve: ELEVATED (stable). 285.0 million barrels, the lowest since 1982, with weekly draws slowed to about 0.4 million.

Outlook

Base case (55%): talks without traffic through October. Contacts resume but no sequence is agreed; transits stay in the single digits to low teens; Brent holds roughly $98–110 on headlines; diesel stays at or near records as heating demand arrives. EU storage finishes near 77–78%.

Upside risk to prices (25%): the bypass is hit. A successful strike on the East–West pipeline, Yanbu or Red Sea shipping, or a collapse of the diplomatic track, pushes Brent above $110 and diesel to new records in several markets at once, and forces the export-restriction decisions governments have so far deferred.

Downside (20%): an agreed sequence. A version of the seven-day plan is accepted and independent transit counts rise for several days; Brent falls toward the low $90s. Diesel follows slowly: product stocks, not crude, set the pace of relief.

What to watch this week. The EIA inventory report on Wednesday 30 September, for whether distillate keeps drawing; the OPEC+ core group on 4 October; whether US–Iran talks are actually scheduled; confirmation of loadings at Yanbu; whether UK diesel breaks its record; and whether Europe’s gas refill holds above +0.20 points a day.

Sources: Al Jazeera, The National, Bloomberg, Axios via The National (Iran plan and US response) · Windward (Hormuz transits) · The National, Euronews (Houthi attacks, France) · Reuters via Zawya, Baird Maritime, OilPrice (Petroline and Yanbu) · EnergyNow, Rio Times (settles) · EIA Weekly Petroleum Status Report (week to 18 September) · AAA · RAC · ACCC 29th weekly report · IATA Jet Fuel Monitor · Kyiv Post (Russian refineries) · GIE AGSI+ direct read (gas day 26 September) · prix-carburants.gouv.fr · GEF shortage-map re-verification (26 September) · GEF operator AIS audit (26 and 28 September). Published 28 September 2026; Brent and WTI figures are Friday 25 September settles. GEF risk ratings: Low / Moderate / Elevated / Critical.