Jim Park: Cummins says its new X15N natural gas-powered 15-liter engine ... too — see what makes this engine so special. Our 579 test truck had the flagship 80-inch ultra-loft sleeper and a fully ...

Cummins and Ram claim that the switch to glow plugs is a result of changes in the engine layout and an attempt to improve ...

Cummins diesel engines are terrific ... with a few exceptions. There were a few years when their quality just wasn't up to ...