Canadian heavy crude grades rang in the new year with a rapid selloff, as differentials plummeted amid heightened market volatility and geopolitical developments. Western Canadian Select (WCS), Canada’s primary heavy crude benchmark, is a blended oil sands grade with low API gravity and elevated sulfur content, making it closely comparable to Venezuelan Merey and Mexican Maya. Structural constraints tied to its landlocked production base and reliance on long-haul transportation anchor WCS to trade at a discount to light sweet benchmarks. Throughout 2025, WCS at Cushing traded between ($7)/bbl and ($2)/bbl below the NYMEX-CME Calendar Month Average (CMA), averaging a roughly ($4)/bbl discount for the year.

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