U.S. crude oil imports: why Middle East barrels matter

For years, the common narrative has been that the United States no longer depends on crude from the Middle East. 

That is true in a broad sense, but it misses an important detail: U.S. refineries still need specific barrels that domestic production does not fully replace. 

In 2025, the United States imported an average of 490,000 barrels per day of crude oil from the Middle East Gulf, equal to 8% of total U.S. crude oil imports, according to EIA.

That is far below Canada’s share, but still slightly above Mexico’s.

Why Middle East crude still matters

Why does that matter?

Because not all crude oil is the same. Most U.S. domestic production is light sweet crude, while many refineries are designed to run heavier and more sulfur-rich grades.

The Middle East Gulf remains an important source of those medium sour barrels, which help refiners optimize equipment, protect margins, and produce the fuels their markets demand.

In 2025, 88% of U.S. crude imports from the Middle East Gulf were medium sour grades, totaling about 432,000 barrels per day.

The West Coast depends more on seaborne imports

This is especially important on the U.S. West Coast.

That region accounted for 47% of all U.S. imports from the Middle East Gulf in 2025.

More than half of those West Coast volumes came from Iraq, with the rest largely supplied by Saudi Arabia and the United Arab Emirates.

The reason is structural: the West Coast produces less domestic crude than the Gulf Coast, and limited pipeline access reduces the flow of Canadian crude into that market.

As a result, refiners there remain more dependent on seaborne imports.

U.S. Crude Oil Imports: Why Middle East Barrels Matter

Crude quality shapes refinery demand

The refining issue is the real story behind the headline.

Energy markets are not driven only by total supply, but by crude quality.

API gravity and sulfur content determine how valuable a barrel is to a specific refinery configuration.

A refinery built to process medium sour crude cannot simply swap in large volumes of light sweet shale oil without losing efficiency or changing its product yield.

That is why Middle East barrels still hold strategic importance, even in an era of strong U.S. oil production.

Why medium sour crude has gained value

The market has made that clear in recent months.

Medium sour crude usually trades at a discount to light sweet grades because it is harder to refine.

But in 2025, the Mars discount to Light Louisiana Sweet averaged about $2 per barrel, and since March, Mars has traded at a premium of roughly $1 per barrel due to supply disruptions linked to the Middle East.

That shift shows how quickly the value of refinery-compatible crude can rise when supply chains tighten.

The strategic role of the SPR

There is also a strategic dimension.

The U.S. Strategic Petroleum Reserve has been acquiring both sweet and sour crude with medium API gravity since 2024, and the release announced on March 11 is intended to help offset displaced medium sour barrels that would otherwise have come from the Middle East Gulf.

For Gulf Coast refiners, and potentially even West Coast buyers if transportation rules are eased, that matters.

The bigger lesson for oil markets

The takeaway for the oil and gas market is simple: U.S. crude oil imports are not just about volume.

They are about fit. Even with record domestic production, American refiners still need certain foreign barrels to keep operations balanced. And in that equation, Middle East crude still matters.