How much has the WCS discount widened?

  • Western Canadian Select (WCS) has recently weakened significantly against the two major crude benchmarks. As of 30 October 2026, WCS was trading at a discount of 33 dollars per barrel to US WTI crude and 46 dollars per barrel to Brent crude.
  • The discount measures the price difference between WCS and benchmark crude. For refineries able to use WCS, a wider discount means more favorable feedstock procurement costs relative to those benchmarks.

Why has Canadian crude weakened relative to benchmarks?

  • Barclays attributes the wider discount primarily to two factors: increased competition from Venezuelan crude in the US Gulf Coast region and higher tanker freight rates.
  • Higher freight rates make crude exports more expensive and, together with competition in the Gulf Coast region, have depressed the price of WCS relative to WTI and Brent.

Which refineries are more likely to benefit?

  • Barclays believes the key to benefiting is whether a refinery can process Canadian heavy crude such as WCS; only with the appropriate processing capacity can lower feedstock prices more readily translate into a cost advantage.
  • The bank singled out bp’s Whiting refinery: the largest refinery in the US Midwest has capacity of approximately 440 thousand barrels per day and can process a crude slate comprising more than 80% heavy sour crude, including Canadian crude, putting it in a position to use cheaper feedstock.