About five years ago, Stefan Clapa took a ride in an 11-second Duramax pickup—a novelty back then. As soon as the pedal hit the floor, he knew he couldn’t get enough of it: the torque, the power, the ...

Oddly enough, Brett Deutsch’s Chevy C10 started its life as a diesel very early—before the Duramax engine was even invented. Originally owned by Brett’s grandfather, the ’69 Chevy had a three-cylinder ...