Every car engine has quite a few details, ranging from cylinder count to compression ratios. How does changing the compression ratio affect the engine?

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 ...

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 ...

Internal combustion engines are incredibly complicated machines that many of us interact with on a daily basis, but don't completely understand. You get in your car, turn the key or push the start ...

For decades, European automakers have championed diesel engines more than anyone else. After all, the technology was invented there – by German engineer Rudolf Diesel in 1897 – and the continent’s ...