A global review finds that water-in-diesel emulsion can slash NOx and soot at the same time, offering a cheaper path to cleaner diesel engines.

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 ...

Diesel engines are known for their reliability, but that's only if proper routine maintenance is provided to the drivetrain ...