Crude stocks rise 3 million barrels as exports drop 1.55 million a day; distillate cover falls to 27 days

U.S. commercial crude oil inventories rose by 2.97 million barrels to 426.4 million in the week ended Sept. 18, the Energy Information Administration said Wednesday in its Weekly Petroleum Status Report. Distillate fuel stocks, the category that includes diesel, fell 428,000 barrels to 107.4 million, 12.7% below the same week last year. Gasoline stocks fell 1.69 million barrels to 206.0 million.

Oil rose after five straight days of losses. Brent was up 2.4% at $101.61 a barrel and West Texas Intermediate was up 1.5% at $91.84 by 10:34 a.m. ET, CNBC reported, as traders weighed renewed U.S.-Iran diplomacy against continuing disruption in the Middle East. Chart: crude oil.

The number behind the build: exports, not demand

A 3-million-barrel build usually reads as a bearish sign that the country has more crude than it needs. EIA's supply table says something else happened. U.S. crude exports fell by 1.55 million barrels a day, to 3.28 million from 4.83 million the week before. Imports also fell, by 1.18 million barrels a day to 5.88 million, but that drop was smaller, so net imports rose by 369,000 barrels a day. Refineries also ran less crude: inputs fell 519,000 barrels a day to 16.81 million.

Weekly export figures are volatile, and one week of fewer export cargoes can swing the headline number by millions of barrels. Much of the new crude also landed at Cushing, Okla., the delivery point for the WTI futures contract, where stocks rose 2.27 million barrels, or about 10.5%, to 23.7 million. Futures traders watch that number closely because it bears on the spread between near-month and later contracts.

Diesel: demand up, stocks down

Product supplied of distillate fuel, EIA's stand-in for demand, rose 473,000 barrels a day to 3.98 million. Divide stocks by that demand and the country held about 27 days of distillate supply (our calculation from EIA's figures). The retail price reflects the tightness: EIA's survey put on-highway diesel at $6.529 a gallon on Sept. 21, up $2.78 from a year earlier and 24 cents in one week. In the Midwest it was $6.680, up 43 cents on the week.

This is the backdrop to the diesel export debate. Treasury Secretary Scott Bessent said the administration is examining whether a full or partial diesel export ban is feasible, as we covered in our story on the proposal. EIA's weekly table shows total petroleum product exports of 7.87 million barrels a day, up 311,000 on the week, but the weekly release does not break out diesel exports separately, so the report alone cannot say how much diesel a ban would keep at home.

Who it hits

Trucking firms and anyone with a diesel fleet. A truck burning 400 gallons a week pays about $1,112 more a week than a year ago at a $2.78 gap, or roughly $57,800 a year per truck (our calculation). Low stocks going into the fall harvest and heating season leave little cushion if demand keeps climbing.

Futures traders. The Cushing build and the crude export drop point in different directions from the distillate draw. Crack spreads, the margin between crude and refined products, are where that tension shows up.

Sources: U.S. Energy Information Administration, Weekly Petroleum Status Report (tables 1, 2, 4 and 7, week ended Sept. 18, 2026); EIA Gasoline and Diesel Fuel Update; CNBC; OilPrice.com. This is market information, not investment advice.