How Much Oil Is Really Getting Through the Strait of Hormuz?

Let’s compare the CENTCOM claim to my Q&A with Grok.

Two-Part Claim

1. The southern route through the Strait of Hormuz remains free and open for all commercial vessels seeking to transit the international waterway.
2. Over the past three months, U.S. forces have assisted more than 1,000 vessels in successfully transiting the strait despite unwarranted Iranian aggression, and these transits continue today.

When you openly lie in your lead sentence, it makes it hard to believe anything else.

The Strait of Hormuz is not open, few ships are traversing and Iran has blown up many ships attempting to get through.

As for part two, what exactly does “assist? mean?

From Grok

Pre-crisis normal traffic through the Strait of Hormuz was roughly 80–140 commercial vessels per day (sources vary by vessel size/type and counting method; IMF PortWatch and others often cite ~88 for larger cargo/tankers; some JMIC figures run higher for all traffic). straits.live

During the 2026 conflict (starting late February), traffic collapsed dramatically—often to single digits or low teens per day (e.g., averages of ~10–15 in recent periods, with some days lower, and declines of 70–90%+ reported). bigoceandata.com

Over roughly 90–100 days from early May to early August at even a low average of 10–15 transits/day, total commercial vessels moving through would be on the order of 900–1,500.

Assisting “more than 1,000” therefore implies U.S. forces provided support (communications, coordination, pathway guidance on the southern/Omani side, monitoring, and defensive response as needed) for a large share of the vessels that did transit amid the reduced flow.

“Assisted” does not mean full naval escorts for every ship.The accompanying 500 million barrels figure averages roughly 5–6 million barrels per day over the period—well below the pre-war ~20 million bpd through the strait, but consistent with partial, supported recovery of some oil flows (including reports of more covert or coordinated movements).

Caveats

• The primary source is CENTCOM. Independent AIS-based tracking (e.g., from firms like Kpler, MarineTraffic, or Bloomberg tallies earlier in the period) has sometimes shown lower visible numbers, partly because many vessels transit with AIS turned off (“going dark”) for security reasons.
• Traffic remains far below normal, and the strait has faced repeated threats, attacks, and route restrictions. The southern route being “free and open” is CENTCOM’s characterization; Iranian claims and ongoing incidents contradict a fully normal, unhindered waterway.

In short, the 1,000+ figure is CENTCOM’s own cumulative claim for assisted transits since early May, and given the documented low-but-nonzero daily traffic during the crisis.

Independent open-source vessel counts do not fully verify or refute the exact assisted total.

Giving CENTCOM the benefit of the doubt on “assistance” traffic is roughly 20-25 percent of normal.

However, much of that was in the MOU period which counts for little.

MOU Period

Mish to Grok: Much of that was in the MOU period which counts for little.

Grok: You’re right that a substantial share of the cumulative total almost certainly came during the temporary MOU window, when conditions were easier.

CENTCOM’s figure is cumulative since early May (or “past three months” as of early August). That window covers:

• Early May → mid-June: Active conflict, very low traffic, higher risk, U.S. pathway/coordination assistance under more contested conditions.
• Mid-June → early/mid-July: MOU rebound period with significantly more vessels moving under the temporary arrangement.
• Mid-July → early August: Renewed hostilities and restricted traffic again.

Because overall volumes were so suppressed outside the MOU window, a large fraction of the 1,000+ assisted transits almost certainly occurred during those few weeks of relative reopening.

CENTCOM does not publish a public day-by-day or period breakdown, so the exact split is not independently verifiable from open sources.

The “despite unwarranted Iranian aggression” framing applies more strongly to the conflict periods than to the MOU rebound, when the temporary deal itself was the main enabler of higher volumes.

In short, the headline number is a cumulative total that mixes high-risk assistance periods with a temporary, higher-volume window under the MOU. The latter portion does dilute the claim of sustained, difficult facilitation under continuous Iranian pressure.

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