Finnish technology group Wärtsilä has introduced a gas-fueled version of its Wärtsilä 31 marine engine, which is recognized by Guinness World Records as the world’s most efficient 4-Stroke Diesel Engine. The engine, dubbed the Wärtsilä 31SG, builds on the efficiency of the successful Wärtsilä 31 engine, but with added flexibility and efficiency compared to its […]

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