Diesel prices poised to hit record high as Iran tensions roil oil markets

Everything is focused on the strait, whether those ships will be allowed through
Oil traders are pricing in the risk that the Strait of Hormuz could be disrupted by Iran tensions, driving diesel toward record highs.

At the intersection of global politics and everyday commerce, Canadian diesel prices are poised to cross into record territory this weekend — not because the wells have run dry, but because the world's attention is fixed on a narrow waterway half a world away. The Strait of Hormuz, through which a fifth of the planet's daily oil supply passes, has become a pressure valve for geopolitical anxiety, and markets are pricing in fear before any blockade has materialized. For Canadians filling tanks or running fleets, the cost of distant instability is arriving at the pump in the most tangible of ways.

  • GTA diesel hit $2.20 a litre Thursday — and analysts expect it to shatter the national record of $2.25 within 48 hours.
  • The driver is not a physical shortage but a psychological one: every statement from Washington about Iran sends oil traders scrambling before a single barrel is disrupted.
  • The Strait of Hormuz carries 20 million barrels of crude daily, and the mere threat of its closure is enough to move global markets instantly.
  • Gasoline remains roughly 40 cents below its own record, but that buffer could erode if the Iran standoff stretches into coming weeks without resolution.
  • Patrick De Haan, a two-decade veteran of petroleum market tracking, calls 2026 the most volatile year he has ever recorded — a warning that the swings are far from over.
  • The uncertainty ripples far beyond the pump, unsettling trucking companies, heating oil customers, and any business that depends on predictable fuel costs.

Diesel pumps across Canada are approaching a threshold no one wants to cross. By Thursday morning, the price in the Greater Toronto Area had already reached $2.20 a litre, and analysts expect it to breach $2.25 — a national record — before the weekend is out.

The cause is not a refinery failure or a supply disruption. It is geopolitics. Oil markets are reacting in real time to escalating tensions around Iran and the Strait of Hormuz, the narrow passage through which roughly 20 million barrels of crude flow daily. Prices do not wait for an actual blockade — they move on the fear of one. When President Trump delivered remarks Thursday night that offered no hint of de-escalation, traders pushed prices higher almost immediately.

"Everything is focused on the strait," petroleum analyst Patrick De Haan told CP24. The central question for markets is whether tankers will be allowed through at all. If that passage closes, even partially, the effects on global supply chains would be swift and severe.

Diesel has felt the pressure more acutely than gasoline. Regular gas in the GTA sat at $1.84 Thursday — still about 40 cents below its all-time record — and De Haan does not expect it to approach that ceiling imminently. But if the Iran situation remains unresolved in the weeks ahead, even gasoline's buffer could be tested.

What distinguishes this moment is not just the record price but the volatility behind it. De Haan, who has tracked oil markets for over two decades, called this the most turbulent year he has ever witnessed — sharp swings driven by geopolitical signals rather than fundamental supply and demand. For trucking companies, heating oil customers, and businesses that depend on predictable fuel costs, that uncertainty may prove as damaging as the price itself.

Diesel pumps across Canada are about to tick past a threshold no one wants to cross. On Thursday morning, the price at the pump in the Greater Toronto Area had already climbed to $2.20 a litre. By the weekend, analysts expect it to breach $2.25—a record high for the country.

The culprit is not a supply shortage or refinery trouble, but geopolitics. Oil markets are reacting in real time to escalating tensions involving Iran and the Strait of Hormuz, the narrow waterway through which roughly 20 million barrels of crude flow daily to fuel the global economy. When that passage tightens or threatens to close, prices spike. Patrick De Haan, who tracks petroleum markets for GasBuddy, explained the mechanism plainly: every speech, every statement from Washington, every hint of military posturing sends traders scrambling. On Thursday night, President Trump delivered remarks that offered no signal of de-escalation. The market heard that and pushed higher.

"Everything is focused on the strait," De Haan told CP24. The question consuming traders and analysts is whether those ships will be allowed through at all. If they are not, the global oil supply tightens instantly. Prices do not wait for the actual blockade—they move on the fear of it.

Diesel has been hit harder than gasoline. While regular gas in the GTA sat at $1.84 on Thursday, still about 40 cents below its all-time record, diesel is racing toward uncharted territory. De Haan expects it to surpass $2.25 within 48 hours. Gasoline, he noted, is unlikely to hit its record imminently, but if the Iran situation remains unresolved in the weeks ahead, even that ceiling could be tested.

What makes this moment notable is not just the price itself but the volatility underlying it. De Haan has been tracking oil markets for over two decades. He called this the most volatile year he has ever recorded. That kind of swinging—sharp moves up and down, driven by geopolitical events rather than fundamental supply-and-demand shifts—creates uncertainty for everyone downstream: trucking companies, heating oil customers, anyone whose business depends on knowing what fuel will cost next month.

The Strait of Hormuz is one of the world's most critical chokepoints. It is also one of the most fragile. A blockade, even a partial one, would reverberate through supply chains globally. Oil traders know this. They price in the risk. And right now, the risk premium is climbing.

Everything is focused on the strait, whether or not those ships that carry 20 million barrels of oil every day through the strait are allowed through
— Patrick De Haan, head of petroleum analysis at GasBuddy
It has been the most volatile year for the price of oil in over 20 years of tracking this
— Patrick De Haan, GasBuddy
La Conversación del Hearth Otra perspectiva de la historia
Inventor

Why does the Strait of Hormuz matter so much to a Canadian filling up diesel on Thursday?

Model

Because 20 million barrels of oil pass through it every single day. If that passage closes or becomes uncertain, the global supply tightens instantly. Traders don't wait for an actual blockade—they move on the threat of one.

Inventor

So the price spike is anticipatory, not reactive to something that's already happened?

Model

Exactly. Trump's speech last night signaled no de-escalation. Markets heard that and priced in a higher risk that the strait could be disrupted. That fear translates to higher prices at the pump within hours.

Inventor

Is this the worst it's been?

Model

In terms of volatility, yes. De Haan has tracked oil for over 20 years and called this the most volatile year on record. That kind of swinging makes it hard for businesses to plan. You can't budget for fuel costs when they're moving this much.

Inventor

Will gasoline hit its record too?

Model

Not immediately. It's 40 cents below the all-time high. But if Iran tensions drag on unresolved for weeks, even gasoline could approach that ceiling. Diesel is the canary right now.

Inventor

What happens to ordinary people if diesel keeps climbing?

Model

Trucking costs rise, which gets passed to consumers through higher prices on goods. Heating oil customers pay more. Anyone dependent on fuel-based transportation or heating feels it directly.

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