Gulf oil flows — excluding Iran — recovered to 19.2 million barrels per day in September, equivalent to 81% of the 23.6 million bpd shipped across Saudi Arabia, Kuwait, Qatar, Oman, Bahrain, Iraq and the UAE in the 12 months before the February 28 outbreak of the Iran war, Vortexa vessel-tracking data showed.

Crude and condensate led the rebound, climbing to 91% of pre-war levels measured against a 16.3 million bpd baseline. Refined product flows — LPG, diesel, jet fuel — lagged at 60% of their pre-war 7.3 million bpd baseline, a divergence now reshaping product trade lanes and pushing wholesale diesel and jet fuel prices to record or near-record highs across Europe and Asia.

What drove the September rebound?

Saudi Aramco's loadings surged by roughly 4.2 million bpd month-on-month to 6.6 million bpd in September, Kpler data showed. The state oil company exported more crude than the rest of the Gulf combined, more than absorbing the collapse of Iranian exports to zero under the US naval blockade and the smaller declines logged by Kuwait and Qatar.

How did the rest of the Gulf perform?

Combined crude and condensate exports from the seven Gulf producers tracked by Kpler — Saudi Arabia, the UAE, Iraq, Oman, Kuwait, Qatar and Iran — rose to about 14.7 million bpd in September from 10.8 million bpd in August. The UAE and Iraq posted modest gains; Kuwait, Qatar and Iran each lost ground, with Iran flatlining at zero after the blockade took hold.

What happened at Yanbu?

Drone strikes last month forced Saudi Arabia to shut the East-West Pipeline and temporarily halt crude loadings at Yanbu on the Red Sea. Despite the outage, Saudi volumes still climbed sharply, accounting for every barrel of the region's net export growth and more.

Why are dark transits back on the carrier agenda?

Non-Iranian Gulf tankers have increasingly switched off their Automatic Identification Systems to evade detection by hostile drones and fast-attack craft. The practice — known as "dark" or "dark fleet" transit — now complicates war-risk underwriting for P&I clubs and charterers.

More VLCCs may reroute around the Strait of Hormuz and Bab el-Mandeb, lifting the premium shippers and charterers pay for hull and cargo cover on Gulf-origin liftings.

What does it mean for shippers and refiners?

The products shortfall is the more immediate commercial problem. With Middle East LPG, diesel and jet fuel exports still down 40% versus pre-war baselines, European and Asian refiners face continued supply tightness into the fourth quarter. Retail diesel markets in several consuming countries sit at multi-year highs, with limited near-term substitution available outside the US Gulf.

For tanker owners and operators, volatility — not volume — has become the dominant planning variable. "Daily flows are considerably more volatile than before the war, so the key question is whether recent levels can be sustained," Vortexa analyst Claire Jungman said.

Looking ahead, whether Saudi Aramco can sustain the 6.6 million bpd September pace through October, and whether further attacks hit Yanbu or other Red Sea terminals, will set the direction for Gulf flows and global product prices into the northern hemisphere winter heating season.