Owners of impacted Ram models say they wouldn’t have purchased trucks had they known more. In December, Cummins agreed to pay a $1.675 billion fine for using diesel emission defeat devices. A class ...

Cummins 14.3L Ace engine is one of the most powerful engines out there, powering U.S. tanks. That said, its unique design may surprise you.

Less fuel and emissions, more power, higher revs. EcoMotors' OPOC engine promised it all. Investors, including Bill Gates, ...