Wärtsilä Fuel efficiency boost

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Wärtsilä Fuel efficiency boost

A high efficiency of the main engine is a key factor for the profitable transport of cargo by vessels. An upgrade with the Wärtsilä Fuel efficiency boost enables the fuel costs of two-stroke engines to be reduced considerably while complying with exhaust emission regulations.

A well balanced combination of an increased compression ratio and modified injector nozzles combined with optimized engine tuning parameters allows fuel savings of up to 4% without significantly increasing the NOx emissions.

Key benefits

  • Reduction of fuel consumption by up to 4% depending on engine load, rating and certified NOx emissions
  • Reduction of greenhouse gases
  • NOx levels remain within the Tier II limits

Download leaflet

    Technical info

    The delivery of the product contains the following modifications:

    • Increase of compression ratio and firing pressure by higher compression shim
    • Injection nozzle with bigger bore to shorten the injection duration
    • Optimization of engine tuning parameters 


    RT-flex82T, RT-flex58T-D, RT-flex58T-E, RT-flex82C, X82 and X72 engines

    Fuel saving feedback from the pilot installation

    WX82 3D
    daily fuel consumption per speed

    The pilot installation of Wärtsilä Fuel efficiency boost shows around 10~12 ton / day lower fuel consumption than sister vessel in the same route and resulted to 1,195 ton of fuel saving in 9 months.

    Press releases

    Downloads & links

    6 pages

    Wärtsilä Fuel Efficiency Boost

    A simple engine retrofit for two-stroke engines could cut fuel consumption at a time when ship charterers have never...

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