Caterpillar C15 Diesel Engine

[@KurtKoster-s6t]

Had a 3406e 550 HP,damn good engine,could bank on 5-5.5 mpg pulling 75 to 80,000 lbs at 75 mph

[@foxy_bl1784]

I don't know many semi motors that can't make it to 1 mil+

[@jacobhumphries4]

Mx-13

[@tomeickhorst6787]

Guess I’m old school I prefer an old mechanical 3406 with some work done to the pump and injectors