RBOB Gasoline Holds Steady as Saudi Supply Gap and EIA Inventory Data Complicate the Crude Selloff
OPEC+ output additions are driving crude lower, but Saudi production data and a gasoline inventory miss are keeping RBOB futures from following.
NYMEX RBOB gasoline front-month was sitting at $3.50 per gallon at 09:09 UTC on Thursday (2026-09-17), unchanged on the session, even as ICE Brent crude front-month slipped 0.74% to $104.02 per barrel following a pullback from the $110 level reached in early trade on September 11, 2026. The gasoline contract's flat performance looks incongruous given the most recent EIA data, covering the week ended September 4, 2026, which showed U.S. gasoline inventories rising by 1.3 million barrels against analyst forecasts for a draw of 2.9 million barrels.5,1
Markets have concentrated on the scale of OPEC+ supply additions. OPEC and its allies raised combined output by 297,000 barrels per day to 38.06 million barrels per day in August, OPEC data showed, with Iraq adding 664,000 barrels per day to reach 3.38 million barrels per day that same month.4,5 The dominant read is that OPEC has capped crude upside and product markets should follow. NYMEX WTI crude front-month was at $101.78 per barrel on Thursday (2026-09-17), up 0.71% on the session.
Yet the Saudi production data carries a complication the selloff appears to have set aside. OPEC's monthly oil market report, as cited by Outlook Money, showed Saudi Arabia reporting August production of 6.24 million barrels per day to OPEC while supplying 7.12 million barrels per day to the market in the same month.5 An 880,000-barrel-per-day gap between stated production and actual market supply suggests Riyadh is drawing down stored crude rather than raising output. Sustained drawdowns eventually end. Incremental production does not. That distinction matters for anyone extrapolating August OPEC figures forward into a structurally looser oil market.5
The EIA crude inventory data adds texture. Commercial U.S. crude stocks fell by 0.4 million barrels to 424.1 million barrels in the week ended September 4, 2026, a modest draw relative to the 9.6 million barrel EIA draw recorded for the week of May 11, 2026.5,1 Commerzbank analyst Norman Liebke observed that "oil inventories are lasting longer than expected, even though inventories of some oil products have already fallen significantly." That split, where crude holds up while refined product inventories tighten at different speeds, can allow product prices to diverge from crude for extended periods.3
The gasoline inventory number itself has layers. Stocks rose 1.3 million barrels against consensus expectations for a 2.9 million barrel draw, a swing of more than four million barrels toward the bearish side.5,1 But OilPrice.com coverage of the U.S. inventory cycle noted that domestic oil stocks had been running below the five-year average for this time of year, which limits how much weight a single week's build can bear as evidence of genuine supply looseness. Distillate stocks also rose 2.1 million barrels in the same reporting week, per EIA data, reinforcing the broad product-loosening narrative, but crude remains the constraint upstream.5,2
NYMEX RBOB gasoline front-month has not followed ICE Brent lower despite the inventory miss, the OPEC output additions, and the $6-per-barrel retreat in Brent since September 11, 2026.5 That persistence may reflect traders discounting the durability of the Saudi supply figures, or it may capture short positioning in crude that has not yet translated into equivalent gasoline exposure. The next EIA weekly petroleum status report is the nearest checkpoint: a second consecutive gasoline build would give the bearish case firmer footing. If the Saudi supply-to-production gap narrows materially in the OPEC monthly data release due around mid-October 2026, the argument for a crude-led products selloff becomes harder to dismiss. Until that data arrives, RBOB's refusal to move lower has not obviously been arbitraged away.5,4