Dual fuel engines

Future proof dual fuel engines

Wärtsilä dual fuel engines allow ships to be operated on either LNG or conventional liquid marine fuels, including LFO, HFO or liquid biofuel. Using LNG instantly and drastically reduces CO2, NOx, SOx and particulate matter emissions. LNG is also well-established as a maritime fuel around the world, with mature legislation frameworks and robust bunkering infrastructure.

The switch between fuels can be made seamlessly without loss of power or speed. Such fuel flexibility enables compliance with emission regulations in controlled areas, while giving operators the option of determining the fuel according to cost and availability.

Wärtsilä engines are a future-proof investment – whatever fuel the future holds, Wärtsilä’s engines will be able to handle it.

Our solutions in more detail

A Wärtsilä engine is born at our Vaasa factory

Watch how one of our engines are built. 

Customer stories

Discover the benefits others have already gained from future proof dual-fuel engines.

  • 3D illustration of Ibaizabal’s new LNG bunkering vessel
    0.9% methane slip, well below FuelEU defaults

    Ibaizabal selected Wärtsilä 25DF with NextDF technology for its new LNG bunkering vessel.

  • MCS cruise vessel Euribia
    1.48% methane slip verified in real cruise operations

    MSC Cruises replaced default emissions assumptions with certified vessel-specific methane slip data.

  • 3D illustration of new James Fisher and Sons plc tankers
    Future-ready LNG tankers with dual-fuel flexibility

    James Fisher selected Wärtsilä 25DF engines to support lower-emission and fuel-flexible tanker operations.

  • Double-digit fuel savings after engine optimisation

    Wasaline combined hybrid propulsion, dual-fuel technology and engine optimisation to improve efficiency and cut emissions.

  • detail image of cruise liner with rescue boats
    First operator to adopt the Wärtsilä 46TS-DF

    Royal Caribbean Group selected the next-generation engine for lower fuel consumption, low emissions and passenger comfort.

  • Polar exploration with lower emissions and high comfort

    PONANT selected Wärtsilä 31DF engines to power the world's only luxury icebreaker.

  • DEME Group
    Lower emissions through a simple software upgrade

    DEME used Wärtsilä's GHG reduction package for 34DF engines to support its fleet decarbonisation goals.

Insights on marine dual fuel engines

  • How to reduce methane slip – winning tactics for your maritime business

    Watch an interesting webinar to learn the smartest, winning tactics to reduce methane slip.

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