Day 219 — the week the diesel reserve came out
Executive summary
The week to 5 October moved on three tracks at once. On the water, four tankers were struck in the Strait of Hormuz between 1 and 4 October by “unknown projectiles” (UKMTO): the Kuwaiti VLCC Kazimah III (1 October, fire, crew safe), the Panama-flagged Uhud (2-3 October, engine blackout), Dynacom’s six-week-old Aframax Lipsi (4 October, engine room damage), and an inbound vessel where a drone entered the funnel and dropped into the engine room. No deaths were reported. These are the first tanker strikes since late July, and they interrupted a recovery that had just seen Windward count 119 commercial transits in the week to 30 September (37% dark).
In Washington, the diplomatic track moved backwards. Around 1 October President Trump rejected a renewed Iranian proposal built on the June memorandum — regional conflict resolution, sanctions removal, release of frozen assets, nuclear discussions — saying it was unacceptable and that Iran was negotiating only because “the money isn’t coming in.” On 2 October Axios reported that US officials now consider airstrikes probable after the November midterms. On 4 October Iran International reported that Trump is weighing the decision with “all options” on the table.
In between those tracks sat the single biggest policy response of the year. On 2 October the G7 agreed through the IEA to release 100 million barrels of diesel and crude from strategic reserves, immediate start, four-month duration, with the first 20 days front-loaded as a diesel release. President Trump pressed for the move and committed not to impose export bans. It is the biggest coordinated reserve release since the IEA’s March 400 Mbbl announcement, and the first direct policy response to the one shortage the barrel cannot fix.
The attacks
UKMTO logged four strikes in four days along the Hormuz corridor, with reporting pointing to the IRGC. The Kazimah III, a Kuwait Oil Tanker Co VLCC, was struck on 1 October and caught fire; all crew were reported safe. On 2-3 October the Panama-flagged Uhud (Emirates Shipping) was hit, suffered an engine blackout and continued its voyage with tug assistance. On 4 October Dynacom’s brand-new Aframax Lipsi — six weeks old, on only her sixth voyage — was struck by a projectile with engine room damage. A separate inbound vessel had a drone enter the funnel and drop into the engine room, causing a small fire. UKMTO describes each as struck by “an unknown projectile”; no party has claimed responsibility.
These are the first attacks since late July (the Dynacom Kavomaleas seizure on 23 July was a separate incident), and they land in the same corridor where GEF’s AIS frames show only Iran’s coastal traffic. The strait absorbs risk rather than reroutes — the strike-and-insurance mechanism, not vessel diversion, is how the pressure transmits to the oil price.
The rejection
Around 1 October Trump rejected a renewed Iranian proposal from Foreign Minister Araghchi based on the June memorandum: regional conflict resolution, sanctions removal, release of frozen assets, nuclear discussions. “Not acceptable,” Trump said; Iran was negotiating “because the money isn’t coming in.” On 2 October Axios reported that US officials now consider airstrikes probable after the November midterms — the first time in weeks the administration has publicly leaned toward escalation. On 4 October Iran International said Trump is weighing the Iran decision with “all options” on the table.
The pattern is familiar: a plan, a rejection, a pause, then a fresh plan from the other side. The new element is the airstrike signalling. GEF’s board moves Hormuz’s direction from stable to worsening on the attack-and-rejection combination, while holding the risk level at CRITICAL.
The G7 release
The 2 October announcement is deliberately diesel-weighted. Of the 100 million barrels, the first 20 days are front-loaded as a diesel release through the IEA and partners; the remainder is a mix of crude and diesel over four months. President Trump pressed for the move after months of resisting it, and crucially committed not to impose export bans — the explicit policy question that had hung over US distillate for a fortnight.
The release is the largest coordinated action since the IEA’s March 400 Mbbl announcement. It targets the market’s structural weakness: crude stocks are recovering (EIA week to 18 September showed US commercial crude at 426.4 Mbbl, 2% above its five-year average) while distillate stocks remain roughly 12% below their five-year average heading into the heating season.
The price reaction was clean: Brent spiked $4.28 on Thursday 1 October on China’s suspension of fuel exports and reports of more US military deployment, then gave it all back on Friday when the G7 release landed. Brent settled $102.25 on 2 October (+0.11% on the week); WTI $91.11 (−1.4%). Monday 5 October intraday Brent is about $101.74.
OPEC+ holds; the Saudi bypass works harder
On 4 October OPEC+ kept November output targets unchanged, with the seven core members’ joint quota at 31 mb/d. The group completed unwinding 1.65 mb/d of voluntary cuts in September; 2 mb/d of extra cuts remain through year-end. Most members are producing below target because of regional conflict. Société Générale reads the balance as a small effective hike through actual output, about +137 kbd; GEF prefers the quota reading. Next meeting: 2 November.
Lloyd’s List reports Red Sea tanker loadings rising as Aramco ramps pipeline contingency. GEF’s last confirmed throughput reading for the East–West line is ~3.5m b/d on 28 September, with Yanbu loading at roughly half of pre-attack rates. A damaged pumping station runs on temporary bypasses, the Houthis keep targeting the terminal intermittently, and war-risk cover remains about 3% of hull value.
UK diesel passes £2 a litre
On 2 October UK diesel broke a psychological barrier the market had been circling for a week: 200.01p a litre, above both the 199.18p of 28 September and the 199.09p record of June 2022 (RAC). Petrol averaged 174.71p. Diesel is up 56.8p (+39.9%) since February; a 55-litre tank now costs £110.01. The RAC says only a sustained lower oil price over several weeks will bring pump prices down, and warned that fuel duty could add another 5p by spring if the current cut expires as scheduled. The G7 release will take weeks to reach the UK pump; the strike-and-rejection cycle has already reached it.
In the United States, by contrast, the policy response has reached the pump faster. AAA’s national regular average eased from $4.48 on 28 September to $4.37 on 4 October; diesel from $6.45 to $6.34, 19 cents below its 22 September record. On the forecast chart GEF rebuilt today, the observed regular line steps back down on 4 October for the first time since the G7 release.
France: 12% back on 4 October after a dip
The French government count ran at 14% of stations short of a fuel on 28 September, dipped to 9% on 2 October, then climbed back to 12% on 4 October. Worst are Grand Est (20%), Pays de la Loire (17%) and Bourgogne-Franche-Comté (13%). TotalEnergies’ cap of €1.99 petrol and €2.25 diesel is unchanged. The dip-and-rebound pattern suggests the cap effect is intermittent rather than fading — price does not reset while market diesel moves above €2.40 and the cap stays below €2.30.
Interconnections
Three links matter this week. First, the attack-insurance channel: each strike on a Hormuz tanker raises war-risk cover, which flows into Brent before it flows into any single-vessel outcome; four strikes in four days is a durable premium even on a flat spot. Second, policy to pump: the G7 release reaches US retail inside two weeks (as 4 October showed) but reaches European retail through the physical and currency chain, which takes longer; UK diesel breached £2 on the same day the release was announced. Third, OPEC+ to deficit: keeping quotas unchanged while the Hormuz corridor is attacked means the global production ceiling stays well above actual output, and real supply still depends on the ships, not the quota.
Risk assessment
Strait of Hormuz: CRITICAL (worsening). Four tanker strikes in four days; Trump rejected a renewed proposal; airstrikes signalled post-midterms.
Bab el-Mandeb / Red Sea: CRITICAL (stable). Red Sea loadings rising at Yanbu; Houthi strikes continue intermittently; GEF AIS Oct 5 shows 6-7 satellite-only contacts.
Global diesel and distillate: CRITICAL (improving on policy). G7 100 Mbbl release targets the structural shortage; US retail eased to $6.34; UK diesel passed £2.
Saudi East–West bypass: ELEVATED (improving). Lloyd’s List: Red Sea loadings rising; last confirmed ~3.5m b/d (28 Sep).
EU gas storage: ELEVATED (stable). ~72.3% on 3 October (Voltstack); GEF direct read 70.87% on 26 Sep; borderline for 80% target.
UK road fuel: CRITICAL (worsening). Diesel passed £2 a litre at a record 200.01p on 2 October.
US SPR: ELEVATED (stable). 285.0 million barrels (week to 11 September), the lowest since 1982.
Outlook
Base case (50%): airstrikes signalled but not launched before the midterms. Tanker attacks continue intermittently; transits in the teens to low twenties; Brent $95-105; US diesel eases toward $6.00-6.20 as the G7 release lands; UK diesel stays above £2; EU gas finishes near 78-80%.
Upside risk to prices (30%): US airstrikes before the midterms. An Iranian response in Hormuz or on Gulf infrastructure pushes Brent above $115 and diesel back to record. Policy relief lags military escalation by weeks.
Downside (20%): a serious diplomatic reset after the midterms. Qatar or Oman mediating a reopening sequence that holds for several days; Brent back toward $85, diesel toward $5.60.
What to watch this week. Whether tanker attacks continue; whether the US-Iran talks resume at all; EIA inventories Wednesday 8 October; delivery of the first G7 diesel barrels in Europe; a direct GIE AGSI+ read on EU gas storage; the Lipsi’s port of refuge and Yanbu loading signals.
Sources: Seatrade, TradeWinds and Riviera (four Hormuz tanker strikes 1-4 Oct) · EA WorldView, Axios, Iran Intl (Trump rejection, airstrikes signalled) · The National, Washington Post, EnergyNow (G7 100 Mbbl release, 2 Oct) · Moscow Times, The National (OPEC+ Oct 4 decision) · Lloyd's List (Yanbu loadings rising) · RAC (UK £2/litre record, 2 Oct) · prix-carburants.gouv.fr (France 4 Oct) · AAA (4 Oct) · Trading Economics (Brent/WTI Oct 2 settles) · Windward (Hormuz week 23-30 Sep) · Voltstack (EU gas 72.3% 3 Oct) · 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.