Long read:

*****

https://ddgeopolitics.substack.com/p/the-new-oil-order

The New Oil Order
Why Heavy Sour Crude Just Became the World’s Most Valuable Barrel–And Who's Winning WW3?
Gregor Jankovič
Mar 18, 2026


For decades, the oil market hierarchy was simple:

Light sweet crude – oil that flows easily and has low sulfur content, making it cheaper and easier to refine into gasoline and diesel – was the premium product. It’s easy to refine, high in gasoline, and priced accordingly.

Heavy sour crude – thick, high-sulfur oil that requires complex refineries to process – was the discount barrel, the ugly duckling that requires expensive, complex refineries to unlock its value. It traded at a permanent discount to light crude, sometimes $15–20 cheaper. Refiners who could process it made money on the profit margin between buying discounted crude and selling refined products.

That hierarchy is now history – most likely permanently.

In three weeks the global oil market has inverted. Heavy sour crudes—led by Russia’s Urals, Canada’s Western Canadian Select, and Venezuela’s Merey—are commanding unprecedented premiums over light sweet crudes.

Brent, the global benchmark, hit $110 per barrel on March 18 intraday — up over 54% in twelve months — before settling at $107.38, with a 52-week range of $58.40 to $119.50. WTI stands at $98.50. Russian Urals (REBCO) is trading at $108.41 as of March 18 — now priced above Brent at export ports. The sanctions discount has evaporated entirely. Western Canadian Select — historically one of the deepest-discounted heavy crudes on the planet — is at $83.18, its discount to WTI having collapsed from a historical average of $17 to under $15. Mars, a Gulf of Mexico sour crude, hit an $11 premium to WTI on March 6 — the highest since April 2020, a staggering jump from just $1.50 a week earlier. Heavy Louisiana Sweet closed at a $5.25 premium, actually trading above its light counterpart — something that "signals higher demand for heavier grades, which typically trade at a discount to lighter grades." (Energynow.com, March 5, 2026)

Is this a temporary spike? No, this is permanent repricing driven by a perfect storm:

• the effective closure of the Strait of Hormuz, through which about 31% of the world’s seaborne oil passes — approximately 13 million barrels per day;

• the resulting loss of Gulf heavy crude production that will take months to restore even after hostilities cease;

• and a global refining complex that was built specifically to run these barrels and cannot quickly adapt.

To understand why, we first need to understand how refineries work and why the type of crude matters as much as the price.

(contd.)