Inside this article

The EIA weekly report for the week ended September 18 is more nuanced than the headline “oil inventories rose”. U.S. commercial crude stocks increased by 2.969 million barrels, while gasoline fell by 1.686 million barrels and distillates by 428,000 barrels. Cushing, the delivery hub for WTI, also rose by 2.266 million barrels.

For traders watching Brent, WTI and energy CFDs, the useful step is to separate crude, refined products, refinery utilisation and the geopolitical risk premium. A crude build does not describe the whole balance.

The EIA numbers to separate

ItemPrevious weekLatest weekChangeWhy it matters
U.S. commercial crude423.429m bbl426.398m bbl+2.969mcrude buffer outside the SPR
Cushing21.482m bbl23.748m bbl+2.266mrelevant to the WTI benchmark
Gasoline207.732m bbl206.046m bbl-1.686mtracks the light-products balance
Distillates107.859m bbl107.431m bbl-0.428mincludes diesel and heating oil
Refinery utilisation—94.0%-2.8 pplower throughput can leave more crude in storage

Reuters also reported that refinery crude runs fell by roughly 519,000 barrels per day. That helps explain how a crude build can coexist with gasoline and distillate draws: when refineries process less feedstock, more crude can remain in storage while less finished product is produced.

A crude build is not automatically bearish

The simple rule “crude up = oil down” is too weak. Inventories also depend on imports, exports, refinery activity and logistics. Reuters reported a rise in net crude imports during the week, another factor that can contribute to a build.

Likewise, falling gasoline or distillate stocks do not by themselves prove that end-user demand surged. Product inventories combine production, trade flows and implied consumption.

The market did not move on EIA alone

Reuters reported that futures were little changed immediately after the EIA release. Later, Brent settled at $103.08, up 3.86%, while WTI ended at $92.16, up 1.81%, with geopolitical risk dominating the session. Early on September 24, both contracts pulled back as Iran signalled openness to diplomacy.

That distinction matters: the EIA report is one information layer; the geopolitical premium is another. It would be misleading to attribute the full daily move to inventories.

The link with diesel margins

Our earlier analysis of record Asian diesel refining margins focused on refined-product tightness and crack spreads. This EIA report adds a different, complementary snapshot: U.S. physical inventories and refinery utilisation.

What the report does not prove

One crude build does not establish a bearish trend. One product draw does not establish a bullish trend. U.S. stocks are not the same thing as the global physical balance, and one weekly observation can be noisy.

The next useful checks are the direction of crude and Cushing stocks, refinery utilisation, gasoline and distillates, net imports and the persistence of geopolitical risk. For a CFD trader, separating those components is more useful than turning one inventory number into a forecast.

Sources

  • U.S. Energy Information Administration, Weekly Petroleum Status / Stocks, released September 23, 2026: https://www.eia.gov/dnav/pet/pet_stoc_wstk_dcu_nus_w.htm
  • Reuters, September 23, 2026, U.S. crude stocks rise while gasoline and distillates fall: https://boereport.com/2026/09/23/us-crude-stocks-rise-gasoline-and-distillate-inventories-fall-eia-6/
  • Reuters, September 23, 2026, Brent/WTI settlement and geopolitical risk: https://uk.marketscreener.com/news/oil-falls-1-on-better-supply-outlook-hopes-for-us-iran-talks-ce785ad9db88f522
  • Reuters, September 24, 2026, oil eases as Iran signals openness to diplomacy: https://www.brecorder.com/news/40440987/oil-prices-fall-as-iran-says-it-is-open-to-diplomacy-to-end-the-war