US Refiners Push Gasoline Yield Below 45% as Distillate Margins Rule

US gasoline refinery yields have averaged less than 45% from January through August 2026, falling below the five-year (2021–2025) low in every single month, according to the US Energy Information Administration's latest Petroleum Supply Monthly. The shift is deliberate. Refiners are redirecting barrels away from gasoline toward distillate fuel oil and jet fuel, where margins are significantly higher amid constrained global supplies.

The numbers define the story. The US refining fleet, structurally oriented toward gasoline, typically posts yields between 45% and 50% (refinery yield is the share of a specific fuel produced from each barrel of crude processed). In practical terms, every 100 barrels of crude run historically yielded 45 to 50 barrels of gasoline. This year that floor has broken, and the decline has persisted despite high gasoline prices — a signal that price signals in the gasoline market are losing the contest for refinery slate share.

What moved and where

Three product yields dominate the US refinery slate: motor gasoline, distillate fuel oil (often sold as diesel), and kerosene-type jet fuel. Together they typically account for 85% to 90% of all petroleum products produced by the fleet. The 2026 reallocation within that envelope is unambiguous:

• Gasoline yields: below 45% on average January–August 2026, and below the five-year low every month.
• Distillate fuel oil yields: above last year's levels generally, and above the five-year average in every month.
• Jet fuel yields: at or above 12% fleetwide since March 2026.

The jet fuel figure marks a threshold. March 2026 was the first time the US refining fleet exceeded an average jet fuel yield of 12%, according to EIA data. The fleet has held at or above that level through the latest Petroleum Supply Monthly data for August 2026.

Why the margins favor distillates

The EIA attributes the yield shift directly to economics. Crack spreads and refinery margins for distillate fuel have been elevated for most of 2026 in response to limits on global supplies of the fuel. Gasoline cracks have not kept pace, even with gasoline prices high.

Jet fuel carries the same incentive, and the trend predates this year. Jet fuel yields were already setting five-year highs for most of 2025. Elevated jet fuel margins in 2026 have provided what the EIA calls a persistent incentive for refiners to continue maximizing jet fuel production. The middle distillates — so named for their relative cut points (boiling ranges) in the refining process — are winning the marginal barrel.

What it means for the slate

The takeaway from the EIA's data is straightforward. The US refining fleet is not running less crude; it is running crude differently. Every incremental barrel of yield flexibility is being pushed toward distillate and jet fuel, and the fleet has now sustained a configuration favoring middle distillates for at least eight consecutive months.

The historical context matters for readers tracking product markets. A gasoline yield below 45% for a sustained period is a departure from the normal operating band of the world's largest refining fleet, and it comes while gasoline prices themselves are elevated — an unusual combination that underscores how much stronger the distillate margin signal has become.

What to watch

The watch items are the September and October 2026 Petroleum Supply Monthly releases, which will show whether the gasoline yield floor holds below 45% as heating season demand for distillate builds, and whether the fleetwide jet fuel yield stays at or above 12%. Any easing of the global distillate supply constraints cited by the EIA would test whether refiners revert to the traditional gasoline-weighted slate.

For now, the data through August 2026 show no reversal. The middle distillate maximization continues.