Latest Market News

TMX pull on Canadian crude stronger than US Gulf

  • Spanish Market: Crude oil, Oil products
  • 21/10/26

Exporting Canadian crude through the 890,000 b/d Trans Mountain (TMX) pipeline system is more profitable for shippers compared to alternative routes into the US, as ample Latin American supply weighs on Western Canadian Select (WCS) Houston.

December-injection cargoes of high-TAN Canadian heavy crude traded around a $13.33/bl discount to December CMA Nymex fob Vancouver over 5-19 October, around a $14/bl premium to assessments for high-TAN crude at the start of TMX in Edmonton, Alberta. This is the widest spread between the prices for a single cycle since the 540,000 b/d Line 2 Expansion came online in May 2024.

This wide premium between selling the same crude at Edmonton and Vancouver implies strong profit margins for shippers on TMX, given current interim tariffs for committed shippers to ship heavy crude to the Westridge terminal in Vancouver range from $7.70/bl to $9.13/bl. This assumes fixed and full variable costs are paid. If variable costs are lower, then shipping margins widen. Making larger minimum commitments to ship on pipelines means operators are often willing to offer lower shipping tolls.

Historically, Canadian shippers looked to maximize exports to the US Gulf coast as refiners there have strong demand and high refining margins for heavy crude. Argus Consulting estimates the US Gulf runs around 1.7mn b/d of coking capacity — more than double the second-highest global region in China. But with the breakout of the Iran war and the return of Venezuelan barrels, the arbitrage from Alberta to the US Gulf has been challenging for most shippers and TMX crude has become the premium export route.

Heavy sour WCS in Houston, Texas, averaged around a $17/bl discount to December CMA Nymex over 5-19 October, or around an $8.74/bl premium to November-delivery WCS at Hardisty, Alberta, over the same period. Tariffs to ship heavy crude from Hardisty to the US Gulf coast range from $8.68-$9.85/bl, leaving the journey profitable only for shippers with the largest commitments and closed for most uncommitted shippers.

Strait constraints

Asia-Pacific markets have borne the brunt of pain from disruptions to crude flow through the strait of Hormuz, and refiners there have been scrambling for alternative crudes. Asian buyers have generally been willing to pay up for heavy sour Canadian TMX crude, despite quality concerns.

Reduced supply of Iranian barrels has also forced independent Chinese refiners, mostly based in Shandong province, into the market and seen fob prices skyrocket. Some traders noted the profitable shipping economics on TMX have increasingly drawn in uncommitted shippers who pay the highest tolls.

Canadian barrels out of Vancouver also offer a comparatively short haul option of around three weeks to ship to China, compared to six weeks for most Atlantic basin grades. TMX barrels have benefited from a reliability factor, given elevated tension in the Mideast Gulf and infrastructure issues that plague rival Latin American heavy producers such as Ecuador, Mexico and Venezuela.

And despite the recent doubling of freight costs, Pacific basin demand for TMX crude has remained robust throughout the war. High shipping costs have also helped to keep Venezuelan and Colombian heavy crude in the Atlantic basin.

Canadian heavy crude differentials have generally widened through the November trading cycle, with bellwether WCS at Hardisty averaging around a $25.70/bl discount to November CMA Nymex over 5-19 October, the widest since November 2023. Argus Consulting forecasts record fourth quarter crude and condensate production of 5.15mn b/d, straining the Canadian pipeline export system. Enbridge rejected 16pc of heavy crude nominations on its 3.1mn b/d Mainline for November, up from 4pc in October, which signals a tight egress environment despite historically low Canadian heavy crude differentials.


Business intelligence reports

Get concise, trustworthy and unbiased analysis of the latest trends and developments in oil and energy markets. These reports are specially created for decision makers who don’t have time to track markets day-by-day, minute-by-minute.

Learn more