Diesel engines still have their place in the modern automotive world, but they're not without flaws, one of the major ones ...

As the Trump administration pulls back from enforcing diesel emissions laws, the president says the pardons are just common ...

Clean your cabinets with soap, water, and a little elbow grease.

President Donald Trump cleared the records of nine aftermarket diesel tuners and mechanics convicted of federal Clean Air Act ...

EPA's relaxed NOx rule, as many expected, removes the warranty extension—and proposes annihilating the troublesome DEF derate ...