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 ...

Miller cycle engines -- like those once used by Mazda -- make less power more efficiently by holding the intake valve open ...

Every motorcycle enthusiast needs to be aware of these legendary engines and what they have done for the industry ...

Harry has been writing and talking about motorcycles for 15 years, although he's been riding them for 45 years! After a long career in music, he turned his hand to writing and television work, ...

Most modern gasoline and diesel-powered engines found in the cars and trucks seen on today's roadways rely on the four-cycle-engine principles developed in the late 1800s by Nikolaus Otto, Gottlieb ...

In response to increasingly stringent emissions legislation, rapid advances in four-stroke hardware technology are leading to the development of new lubricant appetites and severities, primarily due ...

The modern turbocharged four-cylinder engine is the new straight-six, and Stellantis is on the case with the all-new ...

When is an internal combustion engine not an internal combustion engine? When it's been transformed into a modular reforming reactor that could make hydrogen available to power fuel cells wherever ...

As PopMech’s autos editor, I obviously consider myself a car guy. But when it comes to two wheels, the capabilities of modern motorcycles astonish me. We now have road-legal bikes that produce over ...