Cummins’ venerable 5.9-liter diesel engine has undergone many revisions. Here are some highlights of each one. What is a 5.9-liter Cummins diesel engine? Well, for hardcore enthusiasts ...

Cummins engines were dominant in agriculture long before their debut in heavy-duty trucks. The 12-valve 5.9-liter Cummins I-6 engine was developed and installed in Dodge pickups starting in 1989 ...