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CX Daily: How Gutter Oil Became a Prized Fuel for International Airlines

Published: Feb. 3, 2026  9:00 a.m.  GMT+8
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Cover Story: How Gutter Oil Became a Prized Fuel for International Airlines

Once reviled as a public health menace in China, “gutter oil” is now a prized commodity.

Used cooking oil (UCO), to give it its more formal name, has become one of the world’s most sought-after feedstocks for sustainable aviation fuel. Prices have soared as airlines scramble to cut carbon emissions and comply with tightening international mandates. In 2025, a ton of UCO sold for hundreds of dollars more than conventional jet fuel.

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