Trump weighs 90-day diesel export ban as Goldman warns gasoline could climb

The White House is looking hard at a temporary ban on US diesel exports, and Goldman Sachs says the move would cut diesel prices at first and then work against fuel buyers. President Trump is "very seriously" considering a 90-day suspension, according to CNBC, as a way to hold down prices with global supply tight. For anyone running trucks or hauling product, this is the story of the week.

The export ban math

Goldman ran the numbers. A ban would keep barrels home that normally ship out, so diesel prices could fall by about $0.25 a gallon each week the ban is in effect. That sounds good if you are buying fuel. The catch is storage. Once tanks fill up with diesel that can't leave the country, refiners have to cut run rates, and cutting runs means less of everything, gasoline included.

RBN Energy laid out the downside plainly: a diesel export ban carries a stack of unintended consequences. US Gulf Coast refiners are built to export. Take away the outlet and they slow down. Slower refineries make less gasoline right as diesel is being force-fed into the domestic market, and that is how a policy meant to lower one fuel could push the other one up.

So the read for a jobber is mixed. Diesel at the rack could ease for a few weeks if this happens. Gasoline could go the other way. The timing of the storage wall isn't clear, and that is the risk.

What haulers are paying

Diesel is already at record highs before any ban, and the pain is showing up in places that can't hedge. In Morris County, New Jersey, diesel costs for school bus contractors and districts have doubled. Those are fixed-route operators on set contracts, the kind of buyer that eats every cent of an increase because they can't reprice a school run.

For carriers, the surcharge is the pressure valve. When diesel climbs, fuel surcharges climb with it, and shippers pay more per mile whether freight is moving well or not. The problem right now is direction. If the export ban lands and diesel drops $0.25 a week, surcharges reset lower and carriers lose recovery on fuel they already bought high. If the ban stalls out and diesel keeps setting records, surcharges keep rising and shippers start pushing back on rates.

Fuel haulers sit in the middle of this. They move the product that just got more expensive and more politically sensitive, and a 90-day export freeze would rewire where barrels flow and who is short at the terminal. For anyone hauling refined product, the part to watch is allocation and where the diesel actually is, not just the posted price.

The war premium on crude

Crude jumped to open the week after Trump rejected a peace deal that Iran floated at the UN General Assembly. Brent was trading at $107.24 a barrel and West Texas Intermediate at $94.10. The gap between the two is telling. WTI is running softer because of the diesel ban talk itself. If US refiners are forced to cut runs, they buy less crude, and that extra crude sitting around pressures the domestic benchmark even while Brent rides the war fears higher.

For US operators the crude move matters two ways. Higher Brent means the imported and waterborne barrels cost more, which feeds diesel and gasoline both. A softer WTI is small comfort if the reason for it is refiners about to pull back. Europe is dealing with its own diesel surge, and Ukraine is only part of that story, but the piece that reaches a US hauler is simple: global diesel is tight, and tight global markets are exactly why Washington is talking about keeping US barrels home.

What to watch

Whether the export ban actually happens is the first question, and there is no set date on it yet. Trump has said he is considering it seriously, which is not the same as signing it. Watch for a specific announcement with a start date, because the day it takes effect is the day the storage clock starts.

Watch diesel at the rack over the following weeks. Goldman's $0.25-a-week figure is the number to test against. If diesel falls roughly that fast, the ban is working as modeled and the storage wall is the next event. If it doesn't move, the supply crunch is deeper than a policy tweak can fix.

Watch gasoline. If refiners cut runs, gasoline is where the backfire shows up first, and c-store margins move with it.

And watch the crude spread. If WTI keeps lagging Brent, the market is pricing in US refiners slowing down, which tells a hauler more about coming allocation than any headline about the ban itself.