After nearly five years and $1.5 billion in development, the new heavy-duty Detroit Diesel DD15 engine was unveiled Friday, Oct. 19, at the company’s plant in Redford, Mich. The six-cylinder, inline ...

After nearly five years and $1.5 billion in development, the new heavy-duty Detroit Diesel DD15 engine was unveiled Friday at the Detroit Diesel plant in Redford, Mich. The DD15 displaces 14.8 liters, ...

Freightliner says its 2014 Cascadia Evolution, with improved Detroit DD15 power, delivers as much as a 7% improvement in fuel economy over an EPA 2010-compliant Cascadia equipped with first-generation ...