26/05/2026
The Global Motor Oil Crisis: How the Strait of Hormuz is Paralyzing the Automotive Industry
The Japanese automotive giant, Toyota, recently issued a stark warning to its North American dealership network—a warning that underscores a severe and looming crisis in the engine oil supply chain. According to a leaked internal document dated April 30, 2026, Toyota advised dealers to prepare for shortages by temporarily altering standard oil change protocols. For vehicles requiring ultra-light 0W-8 oil, dealers were instructed to use slightly heavier 0W-16 oil in 20% of cases. Similarly, for cars needing 0W-16, they recommended substituting 0W-20 in 10% of cases, strictly limited to a single maintenance cycle.
Why would a major manufacturer compromise on its own factory-recommended specifications? The root cause lies halfway across the world, triggered by a geopolitical storm. Following the outbreak of war in late February involving the U.S., Israel, and Iran, the Strait of Hormuz was shut down. This chokepoint, arguably the most critical maritime energy artery globally, has been closed for nearly three months, trapping the lion's share of Gulf energy exports and triggering the most significant energy crisis in history.
The fallout from this closure is now ravaging the global lubricant market. As Tom Glenn, President of Petroleum Trends International, noted: "I have been working in this field since 1979, and I have never seen anything like what is happening today... Engine oil prices have increased three times within two and a half months. Today, the producer increases the gallon by at least $5 on the biggest distributors." Producers and distributors alike are caught in a pincer movement with no clear escape.
To understand the mechanics of this bottleneck, we must look at how modern engine oils are manufactured. Liquid lubricants are primarily composed of a raw material known as "base oil." According to the American Petroleum Institute (API), base oils are divided into five categories. The automotive industry relies heavily on Group II and Group III base oils. Group III is particularly crucial for modern, low-viscosity synthetic oils (like 0W-8, 0W-16, and 0W-20) due to its high purity, exceptional thermal stability, and superior performance in extreme temperatures.
[The Supply Chain Collapse]
The global supply chain for these premium Group III base oils is highly concentrated. South Korea, for instance, is an absolute powerhouse, controlling more than a third of the world's Group III manufacturing capacity. However, South Korea's massive refineries are entirely dependent on imported raw materials to produce these base oils. This is where the fatal flaw in the supply chain is exposed: South Korea historically imports approximately 61% of its crude oil precisely through the now-closed Strait of Hormuz.
Without the continuous flow of crude oil from the Gulf through the Strait, South Korean refineries—and by extension, other global production hubs—are effectively paralyzed. They cannot produce the necessary volumes of Group II, Group III, or any advanced base oils.
As a result, strategic stockpiles of Group III oils in the United States and globally are projected to be completely depleted by June 2026. The Independent Lubricant Manufacturers Association (ILMA) has issued dire warnings regarding an imminent shortage of low-viscosity oils.
When these stockpiles run dry, we will witness an almost complete disappearance of high-quality engine oils from the market, driving prices to unprecedented, astronomical levels. Car owners will face tremendous difficulties securing standard maintenance, leaving them with no choice but to rely on lower-quality alternatives temporarily or dangerously extend their oil change intervals.
Ultimately, this is how the world is currently adapting to an unprecedented lubricant shortage—a crisis entirely orchestrated by the closure of the Strait of Hormuz.
