The longest-lived diesel still rolling out of factories is not a museum piece or a limited-run curiosity. It is a workhorse straight-six that has powered everything from farm trucks to modern ...

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 ...

Here's the story of perhaps the most legendary diesel engine ever made, the Cummins 5.9L.

If you've spent any time with diesel truck buffs, chances are you may have heard some of them boast about the Power Stroke. But did you ever ask yourself what exactly the Power Stroke really is? Well, ...