Mazda continues to think outside the bento box.

For example, this patent for a supercharged 2-stroke engine with Skyactiv valve timing.

Toyota has teamed up with Chinese automaker GAC to produce the world's first ammonia-powered passenger car.

So why do we look so concerned?

Recently, Mazda announced the e-Skyactiv G, a 3.3-liter inline-six turbo engine.

In the world of efficiency, seeing an automaker announce a new, performance-oriented internal combustion engine gets our attention.

Mazda has recently amended a Skyactiv patent request for a dual spark plug-per-cylinder design.

That could mean a new generation of improved SPCCI engine.

Mike Copeland of Arrington Performance built a hydrogen-powered supercharged LS engine and debuted it at the SEMA Show.

More than a one-off project, this could save internal combustion engines.

A consortium of five Japanese OEMs have combined efforts to produce a performance-based hydrogen combustion V8 engine.

Yamaha, Kawasaki, Mazda, Lexus, and Toyota have jointly developed this impressive 5.0-liter V8

Kawasaki likes superchargers, as evidenced by the popular Ninja H2 and H2R models and a new "Spirit Charger" concept. Learn more about this advanced technology inside.