China’s crude oil imports dropped to roughly 7.8 million barrels per day in May 2026. That’s a decline of approximately 29-33% from pre-war averages of 11.6 million bpd. That missing volume, nearly 4 million bpd, is roughly equivalent to the entire oil output of Iraq.

The catalyst is straightforward. The Iran war, which began with US-Israel military actions on February 28, 2026, severed one of China’s most critical and cost-effective supply lines. Iran had been shipping approximately 1.4 million bpd to China by the end of 2025, accounting for 80-90% of Iran’s total exports. That pipeline effectively went dark.

The structural damage runs deeper than lost barrels

Analysts at both Rystad Energy and Energy Aspects Ltd. are projecting that a meaningful chunk of the lost demand is permanent. Rystad Energy estimates that 200,000 to 600,000 bpd of lost transportation fuel demand may not recover in 2026. Energy Aspects puts the permanent loss at roughly 300,000 bpd, driven by the combined effects of the war and China’s accelerating adoption of electric vehicles.

China’s independent refineries, commonly called “teapot” refineries, had built their business models around discounted Iranian crude. When that supply vanished, these smaller operators couldn’t simply pivot to more expensive alternatives. Many cut refinery runs dramatically.

China drew down around 1 billion barrels from its strategic oil stockpiles to cushion the blow.

The Strait of Hormuz complication

The war has complicated the entire logistics chain through the Strait of Hormuz. Roughly a fifth of global petroleum consumption flows through this narrow waterway on any given day.

Iran has permitted Bitcoin payments for Strait of Hormuz tanker tolls, charging approximately $1 per barrel. The move represents a notable intersection of traditional energy markets and cryptocurrency infrastructure. The Bitcoin toll arrangement has raised concerns among market participants about potential oil-driven volatility spilling into crypto markets, and vice versa.

What this means for investors

For global oil markets, reduced Chinese demand provides a paradoxical counterweight to the supply disruption. A sustained decline of 3-4 million bpd in Chinese purchasing volume acts as a significant brake on global prices, even as war-related supply losses would normally push them higher.

Energy Aspects’ projection of a permanent 300,000 bpd demand loss tied partly to electric vehicle adoption suggests that the war is functioning as an accelerant for China’s energy transition.

China will eventually need to rebuild its strategic reserves, which could create periodic demand spikes. But rebuilding stockpiles at higher prices, without access to discounted Iranian crude, changes the cost calculus entirely.