Detroit Diesel’s two-stroke engines earned their “Screaming Jimmy” nickname the hard way, with a piercing exhaust note and relentless mechanical clatter that turned work sites, logging roads, and ...

Making a new engine while the world’s rushing to switch to electric vehicles only? Mazda said, “why not?” There’s a new innovator in town and it wants you to pay attention. Mazda’s SkyActiv-X engines ...

Every new internal combustion car and truck sold in America today is equipped with a four-stroke engine, as are the vast majority of motorcycles. Today, if you hear the loud, ringing song of a ...