Between the two main engine types seen in automobiles around the world, there is a somewhat complicated gap in pollution between diesel and gas engines.

Let's make something clear from the outset. We aren't talking about diesel engines for marine applications or for 18-wheelers. Or wacko diesel engines for trains. We're talking about diesel engines ...

Typically, an automaker introducing an all-new engine family is a big deal in the automotive industry — and it should be an even bigger deal when that engine is a turbocharged inline-6. Yet somehow, ...

A Duramax Diesel GMC truck on the highway. - Brandon Woyshnis/Getty Images Let's make something clear from the outset. We aren't talking about diesel engines for marine applications or for 18-wheelers ...