Mazda's SkyActiv-X is truly one of the coolest engines of our time! The ideal otto engine is something you may learn about in an introductory course of thermodynamics. It teaches important lessons about thermal efficiency, and it's the ultimate unachievable goal of every engineer who's ever worked on internal combustion development. But that certainly doesn't stop Mazda from trying. With their eyes set on the the ideal engine, they made changes from their SkyActiv-G engine to improve thermal eff