I've noticed an interesting thing in the energy sector that most people overlook. People think that oil is just oil, and that all of it is the same. In reality, it's much more complicated. The quality of the raw material determines the entire geopolitics of the global energy market, but this is rarely discussed.

The key concept is API gravity. This is a measure that indicates whether oil is light or heavy. The higher the number — the easier it is to process into valuable products. Simple math: light oil = lower costs = higher profits.

Let's take American WTI — it’s around 39-40° API. This is light oil that flows easily and yields high outputs of gasoline and diesel. That’s why it’s used as a global price benchmark. On the other hand, Russian Urals is much heavier, about 31° API, and contains more sulfur. It can be processed, but it requires more time and money.

Venezuelan oil from the Orinoco belt is a whole different story. Its API ranges from 8-12°. At this level, it’s not quite oil in the traditional sense — it’s more like tar. It needs to be diluted or heavily processed before it can even flow through pipelines. This makes such oil economically unfeasible for most refineries.

Now, Iranian oil, especially Iran Light, is a different matter. It’s in the range of 33-35° API. Not too light, not too heavy. An ideal balance, I’d say. High yields of fuel, minimal processing costs, excellent feedstock for petrochemicals. That’s why half of Asian and European refineries are designed to handle Middle Eastern oil.

So, it turns out: when sanctions or political tensions block Iranian exports, these refineries can’t just switch to Venezuelan or American oil. The technology doesn’t allow it, the economics don’t allow it. This creates shortages and drives prices up.

That’s why, when asked why Iranian oil is so important on the global markets — the answer is quality. It’s in the perfect spot. In the oil world, quality determines value, value determines demand, and demand shapes policy. Two countries can sell oil, but the strategic value of each barrel can differ dramatically.