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HD Hyundai Heavy Industries has validated the use of ethanol fuel in its four-stroke dual-fuel marine engine. The company conducted combustion and operational tests on its methanol dual-fuel engine platform, confirming stable operation across all load levels and acceptable exhaust gas performance.

The tests required minimal changes to existing methanol engine hardware and focused on the impact of fuel properties on engine behavior. Ethanol, like methanol, can be stored and handled as a liquid and can be produced from bio-based feedstock, potentially reducing carbon emissions.

The shipping industry is increasingly interested in ethanol as a marine fuel, driven by the need for flexibility in fuel supply and pricing. HD Hyundai plans further durability testing to meet classification society requirements and commercial operating conditions, reinforcing its leadership in fuel-flexible engine technology.