Much of those profits came from the sale of diesel engines for consumer and commercial use, including the 6.7-liter turbodiesel inline-six. The 6.7-liter Cummins has been around since 2007 ...

Read more: The 15 Most Reliable Pickup Trucks Of All Time, Ranked Before turning to Cummins for oil burners, Dodge previously used a naturally aspirated 4.0-liter inline-six diesel engine supplied ...