Inline-6 diesel engines are about as close to perfect as it gets for on-road truck use. They’re naturally and perfectly balanced, which means smoother operation, less vibration, and less stress on internal components over the long haul. Most inline-6 diesels also run a longer stroke, which is exactly what you want in a diesel engine—easy torque, low-RPM pulling power, and excellent drivability under load. From a packaging standpoint, inline-6 engines just make sense. With the engine laid out len