#SparkControlledCompressionIgnition

Mazda is bringing its new Skyactiv-X engine, hyped as a major leap forward in internal combustion engine technology, to the Los Angeles Auto Show and the end of the month. Wedged inside the new Mazda 3 sedan and hatchback, the powerplant uses “Spark Controlled Compression Ignition,” which is said to combine the efficiency of a diesel unit with the performance of a gasoline mill. The manufacturer claims fuel economy improvements of more than 30 percent over a standard gasoline engine of the same displacement.

Assuming Mazda meets that mark, it’s a petty impressive feat. The 2.0-liter four-cylinder will debut along with the 3’s new platform in L.A. at the end of the month.