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Mazda announces SKYACTIV-X: gasoline Spark Controlled Compression Ignition

Green Car Congress

This new proprietary combustion engine combines the advantages of gasoline and diesel engines to optimize environmental performance, power and acceleration performance. SKYACTIV-X even equals or exceeds the latest SKYACTIV-D diesel engine in fuel efficiency. the greatest contribution to reducing carbon dioxide emissions.

Mazda 186
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Porsche's New Six-Stroke Engine Explained

The Truth About Cars

But they’re not as popular as they used to be due to emissions concerns and are mainly limited to smaller applications (e.g. Although, they do still see routine use on the massive diesel engines used for large container ships. outboard motors, chainsaws, lawnmowers, mopeds) these days.

Porsche 109