Most people pump diesel without thinking about what's in the nozzle, but the stuff has a long journey before it hits your fuel tank. Diesel doesn't magically come out from underground — it's ...

Cummins has produced some of the most reliable diesel engines available, including its 6.7-liter turbo engine. Among the impressive lineup, the QSK19 is a true workhorse. Designed to improve upon the ...

Discover the engineering marvel behind Mazda's Skyactiv-D 2.2 diesel engine, and what lies ahead for diesel fuel. Mazda unveiled the second-generation CX-5 in 2016 and promised buyers they would soon ...

Scientists are exploring a surprisingly simple way to clean up diesel engines: adding tiny droplets of water to the fuel. During combustion, the water rapidly vaporizes, triggering micro-explosions ...