![Wärtsilä’s new ultra-low emissions version of the Wärtsilä 31DF engine](https://www.marinelog.com/wp-content/uploads/2023/11/warts31df-300x225.jpg)
New ultra-low emissions Wärtsilä 31DF cuts methane slip
Wärtsilä has introduced a new ultra-low emissions version of its Wärtsilä 31DF engine, first introduced in 2015. When operating on LNG, this new version of the dual fuel engine can further reduce