Much of those profits came from the sale of diesel engines for consumer and commercial use, including the 6.7-liter ...

Even though the 5.9L Cummins and 7.3L Power Stroke diesel engines are no longer in production, they’re still popular engines.

Cummins and Peterbilt have created a new demonstration ... For comparison's sake, most modern trucks manage between 5.5 and 6.5 mpg. For most long-haul truck drivers, an increase in fuel economy ...