The Iran Ceasefire Changed Everything. Or Did It? What $94 Oil Really Means for Your Petrol Bill

The biggest single day oil price crash since 2020 happened this week. Brent crude plunged 17% and WTI fell over 16% after President Trump announced a two week ceasefire with Iran, conditional on the complete and immediate reopening of the Strait of Hormuz.

Markets went berserk. The S&P 500 surged 2.7%. The Dow spiked over 1,100 points. And crude oil, which had been trading above $117 just days earlier, crashed below $95. The relief was palpable.

But here is what most of the celebratory headlines are not telling you: the ceasefire is fragile, the Strait is barely open, and your petrol bill is not about to return to normal anytime soon.

The Ceasefire: What Actually Happened

Late on Tuesday, Trump announced he had agreed to suspend US attacks on Iran for two weeks, subject to what he called the "COMPLETE, IMMEDIATE, and SAFE OPENING" of the Strait of Hormuz. Iran, for its part, confirmed it had submitted a 10 point proposal as a basis for broader negotiations.

Sounds promising. Except the fine print tells a different story.

Iran's Foreign Minister Abbas Araghchi clarified that safe passage over the next two weeks would only be possible via "coordination with Iran's Armed Forces and with due consideration of technical limitations." Iran's coastguards warned that any ship attempting to sail without permission would be "targeted and destroyed".

As of Wednesday, just two oil tankers had crossed the strait since the ceasefire took effect. Two. Out of more than 800 vessels trapped in the Persian Gulf, at least 187 of them laden tankers carrying over 172 million barrels of crude and refined products.

Denmark's Maersk said the ceasefire "may create transit opportunities" but did not provide "full maritime certainty." Shipping analysts say restoring normal flows could take six to eight weeks at minimum, even if the ceasefire holds perfectly.

What This Means for Oil Prices

Let us put the numbers in perspective. Oil crashed to around $94 a barrel. That sounds dramatic, and it was, but remember where we started. Before the US Iran war kicked off in late February, Brent crude sat around $67 to $70. Even after the biggest single day crash in six years, oil is still roughly 35% above pre war levels.

The Council on Foreign Relations noted that the Trump administration had already eased sanctions on 140 million barrels of Iranian crude loaded onto tankers back in March, a 30 day waiver designed to tame prices. That helped, but it was a bandaid on a broken arm.

The real question is whether this ceasefire leads to a lasting peace or just a two week breather before hostilities resume. CNBC's analysis was blunt: "significant hurdles remain" and there is "no clear path to lasting peace."

If the ceasefire collapses, analysts warn oil could spike back above $120 or even push toward $150 if shipping disruptions worsen.

Australia: The Most Exposed Country You Have Never Heard About

Here is the uncomfortable truth that this crisis has laid bare: Australia imports roughly 90% of its liquid fuel. Over 80% of refined petrol and diesel comes from Asian refineries in South Korea, Singapore, Malaysia, and China, refineries that themselves rely on Middle Eastern crude shipped through the Strait of Hormuz.

When the strait effectively closed, Australia's vulnerability became frighteningly real. The country had just 36 days of petrol, 34 days of diesel, and 32 days of jet fuel in reserve. That is well below the International Energy Agency's recommended 90 day minimum that most developed nations maintain.

The consequences were immediate and painful:

• Petrol prices jumped 50 cents a litre on average, from $1.69 to $2.19 before peaking at $2.53 in late March
• 107 fuel stations across NSW ran out of diesel in the March crisis
• Six tankers bound for Australia had their journeys cancelled or postponed
• The government was forced to temporarily relax fuel quality standards, allowing higher sulfur levels to unlock 100 million litres of additional supply per month

The Price Gouging Question Nobody Wants to Answer

Here is where things get uncomfortable for the fuel industry. The NRMA accused retailers of outright price gouging, particularly during the first week of the crisis. The allegation: retail prices jumped before wholesale costs had actually risen, at a point when margins were already exceeding 50 cents per litre.

A former ACCC chair went further, accusing petrol retailers of ripping off motorists by hiking bowser prices in lockstep with spot crude oil movements instead of waiting the usual one week lag for those costs to flow through the supply chain.

The ACCC says it is monitoring stations to ensure the government's emergency excise cuts are being passed through to consumers. Early data suggests most retailers complied, though some regional areas lagged. But the watchdog admits it has no power to cap prices or insulate consumers from "normal market increases."

The question worth asking: when crude crashes 17% in a single day, how quickly will your local servo drop its prices? History suggests not nearly as fast as they rose.

What the Data Actually Shows Right Now

According to Petrolmate's live data across more than 11,500 Australian stations as of today:

Unleaded 91 (ULP) averages by state:

The national average sits around $2.30 per litre for unleaded. That is down from the late March peak of $2.53 thanks to the government's excise cut, the first decline in prices since early February. But it is still roughly 35% above where we were before the war started.

Diesel tells an even grimmer story, averaging over $3.20 per litre nationally. For truckies, farmers, and anyone in regional Australia who depends on diesel, the ceasefire offers limited relief.

The Controversial Take: Australia Did This to Itself

Let me say something that will ruffle some feathers. This crisis did not have to be this bad for Australia.

Every credible energy security review over the past decade has warned about our extreme fuel import dependency. The closure of Australian refineries, down from eight to just two (Ampol's Lytton in Brisbane and BP's Kwinana near Perth), left us dangerously exposed. When 20% of the world's oil supply gets choked off at Hormuz, a country that imports 90% of its fuel and holds 36 days of reserves was always going to get hammered.

Compare us to the United States, which is now the world's largest oil producer and a net exporter. Or to Japan, which despite similar import dependency maintains strategic reserves covering nearly 200 days of consumption. Even South Korea, another major importer, holds over 90 days.

Australia chose to let market forces dictate its fuel security. We are now paying the price, literally, at the bowser.

What Happens Next: Three Scenarios

Scenario 1: Ceasefire holds and becomes a lasting deal

Oil gradually drops back toward $70 to $80 over two to three months. Australian petrol prices ease below $2.00 by mid year. This is the best case but most analysts consider it unlikely given the depth of US Iran hostilities.

Scenario 2: Ceasefire holds temporarily, then collapses

Oil bounces between $90 and $110 for weeks. Prices stay elevated through winter. This is what most energy traders are pricing in right now.

Scenario 3: Strait of Hormuz remains contested

Oil spikes back above $120. Diesel hits $3.50 or higher. Government forced to consider rationing. The Australian Strategic Policy Institute has warned this scenario would trigger cascading economic impacts across transport, agriculture, and construction.

The Bottom Line for Your Wallet

The ceasefire is welcome news, but do not expect your petrol bill to return to normal for months, if at all. Even in the best case scenario, the supply chain needs weeks to rebuild. Insurance for tankers transiting the strait needs to be re-established. Refineries need time to ramp production back up.

Here is what you can actually do right now:

• Track prices daily. The gap between the cheapest and most expensive servo in any city is often 30 to 50 cents per litre. Petrolmate's live map shows you exactly where to fill up.
• Watch the cycle. Price cycles still operate in Sydney, Melbourne, and Brisbane. Filling up at the bottom saves real money.
• Consider your fuel type. E10 is consistently cheaper than ULP 91, and most cars built after 2005 can run it. Check fuel options in your area.
• Set up price alerts. Get notified when prices drop at your local stations so you never fill up at the peak.

The fuel industry rarely makes headlines until prices spike. But understanding the geopolitics behind your petrol bill is the first step toward taking control of what you actually pay. This crisis has shown just how connected the bowser is to events happening on the other side of the world.

Keep watching this space. The next two weeks will tell us whether this ceasefire is the beginning of the end, or just the end of the beginning.