The Justice Department says it will no longer pursue criminal charges for removing emissions controls from diesel vehicles.

In a huge win for the diesel "delete" crowd, an internal DOJ memo reportedly called for dropping criminal charges "targeting ...

If you're into diesel trucks, you may already be aware of the fact that a thriving market exists for aftermarket enhancements and modifications. There are various ways to get more horsepower out of ...

Jacobs Vehicle Systems has introduced Active Decompression Technology (ADT), which the company says enables heavy-duty commercial vehicles to benefit from an engine stop-start system and eliminating ...

Cummins has instituted a voluntary recall of roughly 500,000 model-year 2010-2015 engines, according to an announcement from the U.S. EPA. The recall involves faulty emissions systems components that ...

Diesel has had a rough go of it during the last few years, but an increasingly commonplace technology is working to change the fuel's image and make diesel vehicles viable for the future. Kyle Hyatt ...

You might already know that gasoline and diesel engines both operate using the same four-stroke cycle: intake, compression, power, and exhaust. However, a key difference between gas and diesel engines ...