The Ormuz crisis has shaken global oil markets, especially in the wake of the Russia-Ukraine conflict, exposing the vulnerabilities of the world's major oil producers. This crisis highlights that simply being a large producer is not enough to ensure power, particularly when supply chains are disrupted. While oil remains a critical resource, the shift toward renewable energy is gradually reducing the influence of these top oil-producing nations. In the summer of 2026, the three pillars of global oil supply—namely the United States, Saudi Arabia, and Russia—were tested. None were able to act as a buffer against the market shocks. For consumer countries, especially Europe, the message is clear: they can no longer depend on a single, reliable producer to absorb shocks. As a result, policies focused on energy efficiency, electrification, and diversification are becoming central to national security rather than just climate goals. The situation escalated in September 2026, with the price of Brent crude oil hovering around $95 per barrel after peaking at $126 in April and hitting a low of $69 in July. The United States imposed its harshest sanctions on Iran, while Iran threatened to block the Strait of Hormuz entirely. Six months into the Iran-US conflict, the global oil market is now reacting to frequent diplomatic shifts, creating uncertainty. The scale of the disruption is evident. According to the U.S. Energy Information Administration, the volume of crude and liquid oil passing through the Strait of Hormuz dropped to 5 million barrels per day in the second quarter of 2026, down from 21 million barrels per day at the end of 2025. The International Energy Agency (IEA) reports that global oil reserves have fallen below 8 billion barrels, a decrease of over 400 million since late February. If the Strait of Hormuz remains blocked, global oil supply is expected to drop to 101 million barrels per day in 2026, compared to 106 million in 2025, before a potential rebound in 2027 if the strait reopens. This crisis also reveals the growing instability of the three major oil-producing nations. Each faces unique challenges, some of which have been building long before the Ormuz crisis. The United States, the world's largest oil producer, has a record output of 13.6 million barrels per day, but its dominance is based on a fragile system. Shale oil wells lose about 70% of their production in the first year, compared to just 15% for conventional fields. This means most drilling is aimed at maintaining current output rather than increasing it. As a result, American oil producers are struggling to grow their supply, and investment budgets have decreased by about 5% in 2026. This has led to a situation where the U.S. is no longer a flexible supplier but a major price taker. Meanwhile, Saudi Arabia, traditionally seen as the "central banker" of oil, faces its own set of problems. Despite having a sustainable production capacity of 12 million barrels per day, the country is producing only 8 million barrels per day. This is partly due to infrastructure limitations and the threat of a blockade on the West Pipeline, which routes oil around the Strait of Hormuz. The country is also dealing with a budget constraint, as the International Monetary Fund estimates that Saudi Arabia needs oil prices of around $86 per barrel to balance its budget. The kingdom's deficit in the first quarter of 2026 alone consumed most of its annual financial target, forcing it to maintain dividends at the expense of increasing debt. Russia, too, is experiencing a multi-front decline. Its oil production capacity has dropped to 9.5 million barrels per day, far below historical levels. Refining capacity has also fallen to its lowest since 2002 due to Ukrainian drone attacks. Additionally, Russia's dependence on Asian buyers like China and India has exposed new vulnerabilities, as these buyers exert pricing power and require more expensive transportation routes. The result is a significant loss of value for Russian oil exports. Despite these challenges, the world is not yet entering a post-petroleum era. Global oil consumption is expected to rebound in 2027, although the 2026 decline was driven more by high prices and logistical disruptions than a shift to renewable energy. The energy transition is influencing the market, with electric vehicles reducing demand for oil, but this shift is not yet enough to eliminate the need for oil. The crisis underscores that oil power is not just about reserves but also about secure infrastructure, reliable buyers, and the ability to manage capital effectively. As the era of comfortable oil power fades, consumer countries will need to take on more responsibility for energy security, turning climate policies into essential security strategies.