Wood Mackenzie warns US diesel export ban would raise gasoline prices and strain global fuel markets
When US retail diesel prices hit an all-time high of $6.51 per gallon on September 21, 2026, some lawmakers started pushing to pause exports and redirect supply toward American consumers. But a new analysis from Wood Mackenzie suggests the fix could make things worse — not better.
The energy consultancy warns that banning diesel exports would set off a chain of unintended consequences, ultimately shifting the cost burden from the diesel pump to the gasoline pump — and straining fuel markets well beyond US borders.
Record diesel prices prompt calls for an export ban
When diesel hits a record price, the political response is pretty predictable: stop sending it overseas. That’s exactly what some US lawmakers proposed after prices crossed $6.51 per gallon on September 21, 2026 — and kept climbing. The argument sounds intuitive. If American refiners are exporting diesel while domestic prices soar, why not redirect that supply home?
Globally, it would accelerate diesel stock drawdowns in Europe and Latin America at a moment when no obvious replacement supplier is ready or willing to step up.
Wood Mackenzie modeled what would actually happen if that policy became reality. Their conclusion: a ban would undercut its own stated purpose, likely shifting the burden somewhere else entirely rather than easing pain at the diesel pump.
Why US diesel exports have surged in 2026
To understand why a ban would backfire, you first need to understand why exports rose so sharply. Over the six months leading up to the analysis, US diesel exports climbed 340,000 barrels per day above the 2025 average — not by accident, but as a direct response to several global supply shocks hitting in quick succession.
Four disruptions drove the surge: the loss of Middle Eastern barrels following the Strait of Hormuz closure, the disappearance of Russian diesel exports from global markets starting in mid-July, and a lower overall crude supply outlook that tightened conditions further. US refiners stepped in to fill the void. Europe leaned on American supply especially hard — the continent’s share of US diesel and gasoil exports climbed to nearly 50% in September 2026, up from a 30% average through 2025.
How a ban would backfire for US consumers
Here’s where the policy logic breaks down. A ban wouldn’t make diesel disappear — it would redirect approximately 700,000 barrels per day of diesel and gasoil into domestic storage instead of onto export vessels. That sounds like a win for American supply. In practice, it creates an immediate storage crisis.
Wood Mackenzie finds that PADD 3 — the Gulf Coast refining hub — would hit maximum storage capacity in just over one month. The structurally short PADD 1 region, covering the Northeast, would follow roughly five or more weeks after that. There’s simply nowhere to put the product.
To prevent tanks from overflowing, refiners would need to cut crude runs by over 2 million barrels per day. PADD 3 currently imports less than 2 million bpd of crude, meaning cuts at that scale could require increasing US crude exports while diverting some imports elsewhere. Cutting crude runs doesn’t just reduce diesel output — gasoline output falls too, pushing prices higher for American drivers.
“The irony of a US diesel export ban is that it would likely increase costs for American consumers,” said Alan Gelder, SVP Refining, Chemicals and Oil Markets at Wood Mackenzie. “Cutting crude runs to manage the oversupply would shift the cost burden from diesel to gasoline.”
Global markets face accelerated stock drawdowns
The consequences don’t stop at the US border. Wood Mackenzie’s modelling shows that diesel and gasoil inventories outside the US would face faster drawdowns as displaced American supply fails to reach those markets.
Europe is the most exposed. Its refineries are already running at maximum utilization, leaving no spare capacity to absorb the loss of US barrels. Under the ban scenario, Northwest Europe diesel crack spreads are forecast to rise 27% as buyers compete harder for a shrinking pool of non-US supply. Latin America would face a similarly difficult search for replacement barrels.
The modelling identifies China — with roughly 300,000 bpd of spare refining capacity — and Russia at 190,000 bpd as the most plausible gap-fillers. Both come with real constraints. Russia already holds its own export restrictions, and there’s no guarantee Beijing would choose to fill a gap created by a US policy decision.
Context: A tightly supplied global refining market
The structural backdrop makes everything harder. Russia’s diesel export ban has already removed a meaningful supply source from global markets, and European refineries running flat out have no room to ramp up. The global refining system is operating with very little slack.
That leaves China as the only country with material spare capacity to cover a meaningful portion of the shortfall — yet Wood Mackenzie’s analysis notes China may well decide it’s not in its interest to step in. In a market with ample spare capacity, losing one supplier is manageable. In today’s market, it isn’t.
The mechanics of fuel markets
Wood Mackenzie‘s analysis delivers a clear bottom line: a US diesel export ban wouldn’t achieve what its proponents intend. Domestically, it would overfill storage within weeks, force crude run cuts exceeding 2 million bpd, reduce gasoline output, and likely push gasoline prices higher for American consumers. Globally, it would accelerate diesel stock drawdowns in Europe and Latin America at a moment when no obvious replacement supplier is ready or willing to step up. The policy’s stated goal — relief at the pump — would almost certainly be undermined by the mechanics of how fuel markets actually work.
Kelly is an experienced writer with 15 years of experience exploring the big stories that shape our world, from tech breakthroughs and space exploration to climate, energy, and the fascinating quirks of science. She has a talent for turning complex ideas into sharp, memorable insights that stay with readers long after they’ve finished reading.
