AmericasOilWatch Weekly

Mines cleared? Shipping authorities still say Hormuz is severe

27 August 2026

Oil is falling as Washington and Tehran edge toward a navigation arrangement for the Strait of Hormuz, and President Trump says the U.S. Navy has cleared all mines from international waters. But the authority advising merchant ships has not given the all-clear — and this week's EIA report shows the American fuel buffer thinning on a broader front than the week before. Crude has stopped building. Gasoline has now joined diesel in drawing down. And the strategic reserve is at its lowest since 1982.

The numbers — EIA Weekly Petroleum Status Report, week ending 21 August

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Brent was trading around $85.81 a barrel and WTI around $81.09 on Thursday morning, as Iran and Oman continued discussions over a temporary navigation corridor and mine-clearance arrangements in the Strait of Hormuz.

The decline is real and recent. Brent settled at $92.17 on 24 August, then $88.58 on 25 August and $87.84 on 26 August — three consecutive lower settlements — and has fallen again in Thursday trading.

That is genuine relief.

It is not yet a return to normal.

Reuters counted only five commodity-vessel transits through Hormuz on Tuesday, against a ten-day average of about 15 (Kpler). Both sit far beneath the pre-war baseline this publication has used throughout the crisis — a norm near 138 commodity-vessel transits a day.

The price is therefore moving faster than the physical shipping system: markets are pricing the possibility of reopening before commercial traffic has recovered.

And this week two things sharpened that gap. A disagreement about whether the Strait is safe. And an inventory report showing the American fuel cushion thinning in a new place.

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Trump: the mines are cleared

President Trump said on 25 August that the U.S. Navy had informed him that all mines had been removed or detonated from within the international waters of the Strait of Hormuz.

He also warned that any vessel attempting to lay new mines would be "immediately and systematically destroyed."

If sustained, that is a potentially important improvement in the physical security of one of the world's most important energy routes.

But merchant shipping has not received the same message.

JMIC's 25 August assessment continued to warn of a continued risk of drifting or uncharted mines in and near the traffic-separation scheme, said mine-danger areas remained active, and said clearance and survey operations were continuing throughout the Strait.

JMIC maintained the overall threat level at SEVERE.

Those statements are not necessarily contradictory.

Trump referred specifically to mines in international waters. JMIC is assessing the wider operating environment confronting commercial ships — including the traffic-separation scheme, drifting or previously unidentified mines, and areas still undergoing survey and clearance.

But for shipowners and insurers, that distinction is crucial.

A political announcement that known mines have been destroyed is not the same thing as a navigational authority telling merchant vessels that the route is clear.

Our reading is therefore: mine clearance appears to be making material progress, but Hormuz has not yet received an operational all-clear.

That helps explain why crude can fall before shipping returns.

Markets can price a probability.

A tanker owner has to sail through it.

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The tightness just widened

Last week's report showed commercial crude building strongly — up 4.4 million barrels — while distillates drained. The comfortable reading was that America had plenty of crude and a diesel problem.

Wednesday's report weakens the first half of that and strengthens the second.

Commercial crude stopped building. It rose just 0.1 million barrels to 428.9 million — effectively flat after the previous week's large build.

Gasoline fell 2.5 million barrels to 206.8 million, having risen the week before.

Distillates fell again, down 2.2 million barrels to 103.4 million — remaining well below the five-year seasonal average and falling more sharply than the week before.

So the pattern has changed. This is no longer crude accumulating while one product drains. It is crude flat, and both major products drawing at once.

That matters because it removes the cushion the previous week appeared to offer.

America is not running out of crude.

It is operating with a thinner margin in the fuels that actually move trucks, farm machinery, construction equipment and freight — and now, increasingly, in the fuel that moves cars.

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Refineries are running near their ceiling

There is only so much additional output that can be demanded from a refining system already running this hard.

Refineries operated at 97.4% of capacity in the week ending 21 August, up from 97.2%.

That is now twelve consecutive weeks above 95% utilisation — a streak beginning on 5 June, and the longest since September 1998.

U.S. crude production also set a strong pace at 13,843 thousand barrels a day.

Neither figure is a weakness in isolation. Both are signs of a system performing.

But high utilisation is not the same thing as spare capacity.

The risk is not that every refinery suddenly fails.

It is that the system has very little slack available if something does — and it has now been running without that slack for three months.

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Diesel is still moving the wrong way

That pressure is visible at the pump.

EIA's latest national retail figures, for 24 August:

Diesel rose more than five times as much as gasoline.

That divergence matters.

Diesel does not just affect drivers who own diesel vehicles. It feeds through road freight, agriculture, construction, mining, distribution and ultimately the price of moving goods across the economy.

So it is entirely possible for falling crude to relieve the inflation outlook while the physical fuel system remains stressed.

That is exactly the split we are seeing now — and this week the crude side of it fell while the fuel side got tighter.

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The SPR is at its lowest since 1982

The other important U.S. buffer is also being consumed.

The Strategic Petroleum Reserve fell another 3.7 million barrels to 289.7 million — its lowest since November 1982, and 28.3% below where it stood a year ago.

Since 26 June the reserve has given up 35.9 million barrels, an eight-week drawdown averaging about 0.64 million barrels a day.

Using the SPR during a genuine international supply disruption is what the reserve is designed for.

But that does not make its depletion irrelevant.

Every release helps cushion today's market while reducing the inventory available to cushion tomorrow's disruption.

That becomes more important when several buffers are drawn upon simultaneously: distillate stocks are thin and thinning; gasoline has turned; refineries are running exceptionally hard; the SPR is at a 43-year low; and the world's most important oil chokepoint still carries a SEVERE maritime-risk assessment.

None of those facts by itself means the United States is approaching a fuel shortage.

Together they mean the margin for another shock is smaller than the crude price suggests.

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Hormuz is improving — but watch the ships, not the statement

There is now a credible route toward improvement.

Iran and Oman are discussing a framework for a temporary navigation corridor and mine clearance. The United States says known mines in international waters have been cleared. Crude prices are responding sharply.

Those are meaningful developments.

But the sequence that matters is still:

mine clearance → agreed navigation arrangements → insurable passage → rising tanker traffic → sustained normal throughput.

We have not reached the end of that sequence.

JMIC still says SEVERE.

Commercial transits are still far below normal.

And Iran continues to assert authority over vessel movements even as Washington says the waterway is open.

The physical confirmation will come when ordinary commercial vessels begin using the Strait again consistently, without extraordinary escort, routing or insurance arrangements.

Until then, this is de-escalation with evidence of improvement — not normalisation.

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What we are watching next

Whether gasoline's draw was a one-week move. Distillate weakness has been the story for months. Gasoline turning down alongside it is new, and one week is not a trend. Two would be.

Whether distillates stabilise above 100 million barrels. At 103.4 million and falling, that threshold is closer than it was.

Actual Hormuz transits. A sustained rise in commercial traffic would mean more than another political declaration.

JMIC's threat assessment. A move away from SEVERE, closure of mine-danger areas or an explicit navigational all-clear would be important physical evidence.

The crude/fuel split. Crude has now fallen to around $81 on WTI while diesel sits above $5.65 and both product inventories draw. If that persists, the pressure has firmly migrated downstream.

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The AmericasOilWatch view

This week's news from the Strait is better than it was a week ago.

The prospect of negotiated navigation through Hormuz is real. The U.S. Navy appears to have made substantial progress clearing mines. Oil prices have responded.

But the mistake would be to convert "progress" into "problem solved" — and this week the inventory data made that mistake more expensive.

Last week it was possible to say America had crude arriving and a diesel problem. Today crude has stopped building, gasoline has turned down, distillates are further below normal than they were, refineries have spent twelve straight weeks near their ceiling, and the strategic reserve is at a level last seen in 1982.

The maritime authority responsible for informing commercial operators still sees a severe-risk waterway. Tanker traffic remains deeply abnormal.

The United States still has crude.

What it has less of — and less of than last week — is slack.

That distinction is the central story of this energy crisis.

If Hormuz normalises and product inventories begin rebuilding, the pressure can unwind surprisingly quickly.

If crude keeps falling while both fuel buffers, refining capacity and the SPR remain stretched, the market is giving us two different messages.

For the American economy, the downstream one is the more important.

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Benchmark prices are intraday quotes observed at 06:49 UTC on 27 August 2026; the dated Brent figures for 24, 25 and 26 August are daily settlements. Inventory, refinery-utilisation, production and SPR figures are from the EIA Weekly Petroleum Status Report for the week ending 21 August 2026, released 26 August. Retail prices are EIA's weekly series for the week ending 24 August.

Read more on AmericasOilWatch

The War Is Spending Its Buffers. All of Them at Once. — why strategic stocks, transport capacity and other shock absorbers are being consumed together.

Oil Falls 6%, Inflation Fears Ease — but the Fuel Market Is Still Tight — why a falling barrel does not automatically rebuild gasoline and diesel inventories.

Oil Is Pricing a Pause. Shipping Is Waiting for Proof. — the distinction between market de-escalation and physical normalisation.

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— AmericasOilWatch

Independent oil and fuel intelligence for the Western Hemisphere. WTI · U.S. inventories · diesel · SPR · refining · supply-route risk.

Data sourced from the U.S. Energy Information Administration, the Department of Energy and identified market and maritime-security sources. AmericasOilWatch analysis is independent and is not financial advice. Market prices are snapshots rather than forecasts; where a figure is unverified, we say so.