Canadian Heavy Oil Discount Hits US$31 as WTI Settles at $104.12, Widest Gap Since 2022

Canadian heavy crude is selling at its steepest discount in four years while US benchmarks climb. Western Canadian Select traded US$31 per barrel below monthly average WTI as of Tuesday, the widest gap since October 2022, according to General Index data in a Bloomberg report. WTI for December delivery settled at US$104.12 per barrel on Friday, October 30, up US$2.12 or 2.08% on the day, per Reuters settlement data. Alberta producers capture little of that rally.

Friday's settlements set the backdrop

Brent for January delivery, now the front month, settled at US$113.43 per barrel on Friday, up US$2.63. The expiring December contract closed at US$117.64, up US$2.76 or 2.40%. WTI finished October up 15.2% and Brent up 13.6%, Reuters reported. A tanker hit by limpet mines in the Strait of Hormuz and Houthi claims of strikes on Saudi energy sites drove the move.

Why Canadian barrels cannot follow the rally

General Index data show WCS has mostly traded below US$70 per barrel since June, while Brent futures climbed into the US$110s. Link Data Services put the discount of Canadian heavy crude on the US Gulf Coast at US$23.50 per barrel, the largest in data back to 2018. Rising Venezuelan imports, similar in quality to Canadian oil, have built supply there.

Freight compounds the problem. The Baltic Dirty Tanker Index stood at 7,163, after a record above 8,000 earlier this month and a reading below 2,000 before the war. HF Sinclair COO Steven Ledbetter said "quite a bit of crude on the water in tankers" is "putting pressure on WCS."

Archive callback: from US$26.40 to US$31

Two weeks ago, Oil Authority tracked the Hardisty discount at US$26.40 per barrel on October 15. That reading compared November WCS at Hardisty with WTI, while General Index uses monthly average WTI, so the two figures use different bases. Direction still matches: the gap is wider, and Canada's export pipelines were already nearly full, per Reuters.

The Alberta Energy Regulator put the 2025 average WTI-WCS differential at US$11.14 per barrel. Today's US$31 reading is 2.8 times that level. Supply has not changed much since mid-October; takeaway, freight and Gulf Coast crowding have tightened.

What the spread costs Imperial and ExxonMobil

Imperial Oil reported record third-quarter net income of C$2,454 million on Friday. WCS averaged US$71.90 per barrel in the quarter, and the WTI/WCS spread averaged US$13.78, against US$10.35 a year earlier. ExxonMobil owns about 69.6% of Imperial and intends to participate in its buyback to hold that stake.

Moving from a US$13.78 spread to US$31 adds US$17.22 per barrel. For every 1 million barrels per day priced off WCS, that equals US$17.22 million per day, or US$6.29 billion over a year. Imperial's share of Kearl output is 200,000 barrels per day, so an unhedged, fully WCS-linked barrel would imply US$3.4 million per day, or US$1.26 billion annually.

That is an illustration, not a forecast. The bases differ, Kearl barrels do not price exactly at WCS, and Imperial's 381,000 barrels per day of refinery throughput at 88% utilization offsets part of the hit. CEO John Whelan called the "advantaged integrated business model" the driver of strong results. Producers without refineries carry the full discount, and WCS is priced in US dollars, so it cuts Canadian dollar revenue directly.

Pipeline relief and US drilling response

About 90% of Canada's oil goes south to US refiners. Canada and Alberta are backing a new pipeline to British Columbia's coast with one million barrels per day of capacity for Asian markets. Tamarack Valley Energy has signed long-term capacity on the expanded Trans Mountain system starting next year, and president Steve Buytels said it provides "diversification of that barrel into different markets."

US drillers are responding more slowly than prices imply. Baker Hughes counted 603 active rigs in the week to October 30, unchanged for a third week and up 57 from a year earlier. Oil rigs rose by two to 462, while gas rigs fell by two to 130.