Finnish manufacturer Wärtsilä introduced an engine back in 2015 that was so good, it snagged a Guinness World Records title for being the most efficient four-stroke diesel engine shortly after its ...

Imagine a cargo ship pulling away from port and, instead of burning diesel, it runs on fuel made from the very seawater beneath its hull. That is the vision behind a new United Kingdom project that ...

Diesel-powered submarines present a seemingly paradoxical challenge: diesel engines require oxygen to operate, while submarines spend most of their time underwater.