Western Canadian Select Discount Narrows to $13.40 as WTI Reaches $82.49, Giving Alberta Producers $69.09 Per Barrel at Hardisty

Western Canadian Select crude for August delivery settled at $13.40 per barrel below West Texas Intermediate on July 15, per brokerage CalRock. The discount narrowed from $15.25 on July 2, the widest reading of the month, as renewed Iran conflict concerns drove global crude benchmarks sharply higher. WTI crude climbed to $82.49 per barrel on July 17, per CME Group, rising $3.54 or 4.48% in a single session. Applying the $13.40 differential to that WTI close, Alberta heavy oil producers at Hardisty collected $69.09 per barrel on August delivery contracts.

June Supply Disruptions Tightened the Spread to a Seven-Month Low

The WCS discount tightened to $11.65 per barrel below WTI on June 11, its narrowest reading since November 2025. A power outage at Cenovus Energy's oil sands operations and prolonged wet weather across northern Alberta reduced crude supply that month. Trans Mountain's main export pipeline simultaneously reached apportionment in June, the first time since the expansion completed in May 2024, per BOE Report. Apportionment occurs when spot pipeline demand exceeds available capacity, a marker that market demand for Canadian exports had grown to fill all 890,000 barrels per day of Trans Mountain's rated throughput.

Oil Sands Maintenance Restarts and Hormuz Developments Widened July's Spread

When oil sands operators completed their spring turnarounds by early July, crude supply rebounded. The August-delivery WCS discount widened to $15.25 per barrel on July 2 before beginning to recover. Increased volumes of crude transiting through the Strait of Hormuz, as geopolitical conditions around Iran's shipping lanes shifted week to week, added to global heavy crude supply. China's import appetite for heavy grades remained soft through the period, compounding the pressure on WCS specifically. Lee Williams of Wood Mackenzie stated: "Looking forward, significant risk for ongoing volatility and discounting remains as long as global disruptions persist."

Trans Mountain Expansion Has Delivered a Structural $5.25 Per Barrel Gain for Producers

The mid-July differential of $13.40 per barrel is tighter than the annual averages recorded before the Trans Mountain Expansion opened in May 2024. The WCS-WTI spread averaged $18.65 per barrel in 2023 and $14.73 per barrel in 2024, per Alberta Energy Regulator data. The AER's 2025 forecast projected a differential of $11.00 per barrel as TMX completed its first full operating year. The current reading of $13.40, while wider than the AER's $11.00 annual forecast, remains well below the 2023 average of $18.65, reflecting the structural impact of TMX on Canadian heavy oil pricing.

At 2023's $18.65 differential, a barrel of WCS priced against July 17's WTI of $82.49 would have cleared just $63.84. The current $13.40 spread yields $69.09 instead, a $5.25 per barrel improvement attributable to the pipeline's Pacific Rim market access. An operator producing 300,000 barrels per day captures $575 million more in annual revenue at this differential improvement, before royalties and transportation costs. Canadian oil sands producers holding firm Trans Mountain capacity are the primary beneficiaries of this structural shift.