Finance

Iran conflict boosts U.S. Gulf oil prices to highest since 2020

Published by Global Banking & Finance Review

Posted on March 6, 2026

3 min read

· Last updated: April 1, 2026

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Iran conflict boosts U.S. Gulf oil prices to highest since 2020
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By Siddharth Cavale NEW YORK, March 6 (Reuters) - U.S. Gulf Coast heavy grades continued to surge on Friday as the Iran conflict spurred several Middle Eastern producers of heavy crude to curtail

Iran conflict boosts US Gulf oil prices to highest since 2020

Impact of Middle East Tensions on U.S. Gulf Oil Markets

(Corrects source in paragraph 7 in March 6 story)

By Siddharth Cavale

Surge in U.S. Gulf Coast Heavy Grades

NEW YORK, March 6 (Reuters) - U.S. Gulf Coast heavy grades continued to surge on Friday as the Iran conflict spurred several Middle Eastern producers of heavy crude to curtail production and drove buyers to scoop up U.S. barrels.  

Record Premiums for Mars Sour Crude

Prices of Mars sour crude, the flagship crude produced in the U.S. Gulf of Mexico and favored by refiners globally, traded at a $11 premium to U.S. benchmark West Texas Intermediate (WTI) crude on Friday, brokers said. That was the highest since April 2020, and up $4 from Thursday.

Just a week ago it traded at a premium of $1.50.

Other Heavy Grades Also Rise

Other heavy grades such as the Heavy Louisiana Sweet and the West Texas Sour also rose.

Global Oil Price Movements

Benchmark crude oil prices have surged since the initial attacks last week, with Brent crude settling at $92.69 a barrel, its highest level since October 2023 on Friday.

Supply Disruptions from the Strait of Hormuz

The effective closure of the Strait of Hormuz has forced several countries, including Iraq, to curb output. The strait is a key route for medium and heavy sour crude from the Persian Gulf, and those flows are now largely cut off. Additional production cuts announced in Kuwait on Friday also helped lift Mars prices, a trader said.

Asian Buyers Scramble for Alternatives

“Refiners that rely on these grades will need to find similar, or roughly similar, alternatives to replace the lost barrels, so Mars and other U.S. Gulf sour heavies and mediums are natural substitutes and are getting bid up aggressively,” said Matthew Lewis, founder of Plainview Energy Analytics, adding that buyers, especially in Asia, are scrambling for more of these medium and heavy crude barrels.

Seasonal and War-Driven Demand Factors

"This time of year also marks the shift from winter into driving season, when demand typically rises across all crude grades," said Tim Snyder, chief economist at Matador Economics, adding that ultimately the supply disruption caused by war was driving prices.   

"In the short term we will continue to see these grades rise until we see the Strait of Hormuz open up," Snyder said.

(Reporting by Siddharth Cavale in New York and Georgina McCartney in Houston; Editing by David Gregorio)

Key Takeaways

  • Mars sour crude traded at an $11 premium to WTI on March 6, 2026—the loftiest since April 2020—up $4 in one day and from just $1.50 a week earlier (argusmedia.com).
  • The Iran‑U.S conflict and effective closure of the Strait of Hormuz, a conduit for roughly 20 % of global oil flows, triggered the surge in U.S. Gulf heavy crude demand (washingtonpost.com).
  • Brent crude soared to around $92.69 per barrel—the highest since October 2023—on heightened war‑risk premiums and disrupted Middle East flows (en.wikipedia.org).

References

Frequently Asked Questions

Why have U.S. Gulf Coast oil prices increased?
U.S. Gulf oil prices surged due to the Iran conflict, which led Middle Eastern producers to cut heavy crude output, boosting demand for U.S. grades.
What is the current premium for Mars sour crude?
Mars sour crude is trading at an $11 premium to U.S. benchmark West Texas Intermediate, the highest since April 2020.
How has the closure of the Strait of Hormuz impacted oil supply?
The closure effectively halted flows of medium and heavy sour crude from the Persian Gulf, forcing buyers to seek alternatives like U.S. Gulf crude.
Which regions are showing increased demand for U.S. crude?
Buyers, especially in Asia, are scrambling for more U.S. medium and heavy crude barrels amid supply disruptions.
Will U.S. Gulf oil prices remain high?
Prices are expected to stay elevated until the Strait of Hormuz fully reopens and Middle Eastern supply resumes.

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