What's Happening
On September 26, 2026, ExxonMobil and Chevron — the two largest US-listed oil majors by market capitalization — issued rare, concurrent warnings that sustained military conflict involving Iran poses a serious upside risk to global fuel prices, with no near-term relief in sight. The warnings, reported by EnergyNow, represent a significant escalation in how the private sector is communicating geopolitical oil risk to investors and, by extension, to the broader market.
The timing is critical. Brent crude had already been trading in the $94–$98 per barrel range heading into late September, elevated by a combination of OPEC+ supply discipline and tightening global inventories. WTI crude, the US benchmark, was hovering near $91–$93 per barrel — roughly $12–$15 above where it stood at the same point in 2025. Against that backdrop, any disruption to Iranian oil flows or, more critically, to Strait of Hormuz shipping lanes, could push Brent past $110 per barrel within weeks, according to energy market analysts.
Iran currently produces approximately 3.2–3.4 million barrels per day (bpd), a significant portion of which moves through the Strait of Hormuz — the narrow chokepoint through which roughly 20% of the world's seaborne oil transits daily. A full closure or even a partial disruption of that corridor would send shockwaves through global crude markets that would be felt almost immediately at US gas stations.
Exxon and Chevron's warnings are not abstract. Both companies have significant downstream refining and retail exposure, meaning their executives have direct visibility into how crude price spikes translate to margin compression and retail price surges. When oil majors of this scale publicly flag geopolitical risk, markets — and drivers — should pay close attention.
Data Snapshot
As of late September 2026, the AAA national average gas price sits at approximately $3.89 per gallon for regular unleaded, up roughly 18 cents from the same week in August — a steeper-than-seasonal climb that analysts at GasBuddy attribute partly to pre-conflict risk premiums already being priced into crude. According to EIA weekly retail gasoline data, the national average has risen in six of the past eight reporting weeks, with the most recent week showing a 7-cent week-over-week jump.
WTI crude spot prices are trading near $92 per barrel, while Brent is at approximately $96 per barrel, according to EIA crude oil spot price data. EIA's latest weekly petroleum status report showed a draw of 4.2 million barrels from US commercial crude inventories — the third consecutive weekly draw — signaling that domestic supply buffers are thinning precisely when geopolitical risk is spiking. OPEC+ is currently holding to a collective production cut of approximately 3.66 million bpd relative to its 2022 baseline, leaving limited spare capacity to cushion a supply shock.
Why It Matters at the Pump
The rule of thumb used by energy economists is that a $10 per barrel increase in crude oil prices translates to roughly 23–25 cents per gallon at the retail pump, though the pass-through is rarely linear and can take two to six weeks to fully materialize. If an Iran conflict scenario pushes Brent from its current ~$96 level to $115 or higher — a scenario that Goldman Sachs energy analysts have modeled as plausible under a Hormuz disruption — US drivers could be looking at a national average gas price today that climbs from $3.89 toward $4.35–$4.50 per gallon within four to eight weeks.
That kind of move would not hit all regions equally. California, already paying a state average near $4.85 per gallon due to its unique fuel blend requirements and high state excise taxes, could breach $5.50 per gallon under a severe disruption scenario. The West Coast more broadly — Oregon, Washington, Nevada — would feel the sharpest early impact because West Coast refineries source a higher proportion of their crude from international markets, including Middle Eastern suppliers.
The Midwest, which benefits from proximity to Cushing, Oklahoma — the WTI delivery hub — and a dense pipeline network, typically absorbs crude price shocks more slowly. Current Midwest averages are running near $3.55–$3.65 per gallon, but a prolonged conflict scenario would erode that buffer within weeks. The Gulf Coast, home to the largest US refining complex, would see mixed effects: higher crude input costs offset partially by proximity to domestic production. The Northeast, already constrained by aging refinery infrastructure and dependence on imported refined products, faces above-average vulnerability to any Atlantic Basin supply tightening.
What's Driving This
The Exxon-Chevron warning is rooted in three compounding risk factors that energy market veterans say are unusually aligned right now.
First, the Strait of Hormuz threat is not theoretical. Iran has previously seized tankers, deployed naval mines, and threatened to close the strait during periods of heightened tension — most notably in 2019, when attacks on Saudi Aramco infrastructure briefly knocked out 5.7 million bpd of Saudi production and sent Brent surging 15% in a single session. A full-scale conflict would dwarf that disruption.
Second, OPEC+ spare capacity — the global oil market's primary shock absorber — is at its thinnest in years. Saudi Arabia and the UAE hold the bulk of the world's usable spare capacity, estimated by the IEA at roughly 3.5 million bpd combined. But deploying that capacity takes weeks, and it cannot fully replace Iranian volumes if a conflict triggers broader Gulf instability.
Third, US Strategic Petroleum Reserve (SPR) levels, while partially rebuilt from their historic 2022 lows, remain well below pre-drawdown levels — limiting Washington's ability to deploy the same aggressive SPR release strategy it used in 2022 to cap prices. The Department of Energy has indicated the SPR holds approximately 370–380 million barrels, compared to over 600 million barrels before the 2021–2022 drawdowns.
Refinery utilization in the US is also running near 91–92% of capacity, leaving little slack to ramp output if crude supply tightens.
Historical Context
To understand the potential magnitude of an Iran-driven price shock, it helps to look at the historical record. The 1979 Iranian Revolution triggered a crude price doubling within 12 months. The 1990 Gulf War sent crude prices from roughly $17 per barrel to over $40 in a matter of weeks before a coordinated IEA release stabilized markets.
More recently, Russia's February 2022 invasion of Ukraine pushed WTI from approximately $95 per barrel to an intraday high of $130.50 in March 2022 — a 37% spike in under four weeks. The US national average gas price hit an all-time record of $5.016 per gallon in June 2022, according to AAA data, before aggressive SPR releases and demand destruction brought prices back down.
By comparison, the current setup — WTI near $92, national average near $3.89, and inventories drawing down — represents a market that is already stretched before any conflict premium is fully applied. Analysts at the EIA noted in their September 2026 Short-Term Energy Outlook that downside supply risks were "elevated relative to historical norms," a notably cautious formulation for a government agency.
The 2019 Abqaiq attack provides perhaps the most relevant analog: a single, temporary supply disruption caused a 15% single-day crude spike. A sustained Iran conflict would be categorically more severe.
Regional Breakdown
California ($4.85/gal avg) leads the nation in pump prices and would be first and hardest hit. The state's CARB-spec fuel requirements mean it cannot easily import gasoline from other US regions, making it acutely vulnerable to any West Coast refinery disruption or international crude supply tightening. A $15/barrel crude spike could push California averages toward $5.60–$5.75 per gallon.
Washington and Oregon, currently averaging $4.20–$4.35 per gallon, face similar West Coast supply dynamics and would likely see prices climb in lockstep with California.
Texas and the Gulf Coast states ($3.20–$3.40/gal) benefit from proximity to domestic production and refining, but are not immune — Gulf Coast refineries process significant volumes of imported heavy crude that would be repriced in a conflict scenario.
The Midwest ($3.55–$3.65/gal) has the most insulation in the short term due to pipeline connectivity to Cushing and domestic shale production from the Permian and Bakken basins. However, a prolonged conflict lasting more than 60 days would erode this advantage as global crude benchmarks reset higher.
The Northeast ($3.70–$3.85/gal) faces above-average risk due to its dependence on imported refined products and limited pipeline connectivity from domestic refining centers.
Florida ($3.50–$3.60/gal) sits in a middle tier, supplied by Gulf Coast refineries via pipeline and tanker, with moderate exposure to a conflict-driven price surge.
What Experts Are Saying
The Exxon and Chevron warnings align with a growing chorus of concern from energy market analysts. The IEA, in its most recent Oil Market Report, flagged Middle East supply risk as the primary upside price scenario for Q4 2026. Goldman Sachs energy analysts have previously modeled a Hormuz disruption scenario that puts Brent at $110–$120 per barrel within 30 days of a significant conflict escalation.
GasBuddy's head of petroleum analysis has noted that the geopolitical risk premium already embedded in current crude prices — estimated at $6–$9 per barrel — could triple or quadruple if conflict escalates beyond current levels. AAA has warned its members that the fall driving season, typically a period of price relief as summer blend requirements expire, may not deliver the usual 15–20 cent per gallon seasonal discount if crude markets remain in crisis mode.
The EIA's September 2026 Short-Term Energy Outlook projects US regular gasoline averaging $3.75–$3.95 per gallon through Q4 2026 under a baseline no-escalation scenario — a forecast that analysts widely view as optimistic given current geopolitical conditions.
What Drivers Should Expect
In the near term — the next two to four weeks — gas prices today are likely to remain volatile, with upward bias. Every escalatory headline out of the Middle East will add cents to the crude price, and those cents flow to the pump with a lag of roughly two to three weeks. Drivers should not expect the seasonal fall price relief that typically arrives in October as refineries switch to cheaper winter-blend gasoline formulations; that tailwind may be fully offset by geopolitical headwinds this year.
If conflict remains contained and does not directly threaten Strait of Hormuz shipping, the national average price per gallon could stabilize in the $3.85–$4.05 range through November. If the strait is threatened or closed even temporarily, analysts say $4.50+ nationally is a realistic near-term ceiling — with California and the West Coast pushing well above $5.00.
For drivers, the actionable advice is clear: fill up sooner rather than later if your tank is below half. Use GasBuddy or the AAA TripTik app to identify the cheapest stations in your area — price dispersion within metro areas can be 30–40 cents per gallon, representing real savings. Wholesale club stations (Costco, Sam's Club) typically run 10–20 cents below the local average. If you drive a flex-fuel vehicle, check E85 availability — ethanol blends are largely insulated from Middle East crude disruptions and may offer significant savings in the weeks ahead.