The most important number at Sunday's OPEC+ video call may be the one ministers do not vote on. Seven core producers — Saudi Arabia, Russia, Iraq, Kuwait, Algeria, Kazakhstan and Oman — are due online at 11:00 GMT on 6 September to set October levels, and sources close to the talks tell Reuters the likely decision is to hold policy steady.

That would be the logical next chapter after August's agreement to add 188,000 barrels a day in September, completing the phased reversal of 1.65 million b/d in voluntary cuts first announced in 2023. OPEC's own statement from the 2 August meeting already scheduled this Sunday review. Delegates have since signalled they expect quotas to stay flat for the rest of 2026 unless market conditions force a rethink, while a separate layer of older cuts remains in place through year-end.

Paper barrels and physical barrels are no longer the same story. Much of the restored quota has not shown up as exported crude: the Iran war has disrupted Gulf flows through the Strait of Hormuz, and the Ukraine war has hit Russian and Kazakh exports. OPEC output rose in July, reporting showed, but still lagged the group's higher ceilings. Analysts tracking Energy Information Administration estimates put regional shut-ins during the summer in the multi-million-barrels-a-day range — an order of magnitude larger than the last voluntary increase.

That is why Brent's week near the low-to-mid $90s, and record US diesel earlier this week, are being priced off conflict logistics rather than the OPEC+ calendar. Inventories have drawn hard through the second and third quarters on disrupted Middle East supply, Strategic Petroleum Reserve releases have cut into US emergency stocks, and tanker counts through Hormuz remain well below recent averages even when Washington claims partial normalisation.

Sunday's meeting is therefore less a supply decision than a recognition of limits. Attention inside the group is already shifting toward 2027 production baselines and capacity reviews, after the UAE's exit and Iraqi lobbying for higher ceilings exposed how contested the quota arithmetic has become. Until Hormuz and refining outages ease, holding the line on October quotas will change little at the pump. The wars, not the spreadsheet, are still setting the price.