Aurora Expeditions has completed its first biofuel trial, marking a milestone in the company’s commitment to reducing greenhouse gas emissions.

In May 2025, the Sylvia Earle became the first Infinity-class ship to trial Hydrotreated Vegetable Oil (HVO), a sustainable biofuel made entirely from used cooking oil.

The ship bunkered HVO in Valencia, Spain, and operated for several days along the Spanish coastline running on 100 percent HVO, the company said in a press release.

According to the fuel’s Proof of Sustainability certification, this resulted in an estimated 90 percent reduction in fuel-related greenhouse gas emissions compared with conventional marine fuel.

The trial was completed smoothly, with no impact on engine performance. Preparations included cleaning the fuel tanks and m

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