This is just ridiculous. Mazda's innovative 3 new aspects to improve fuel economy? Improving the engine, improving the transmission and reducing weight. How exactly is that any different than what Hyundai's done with their latest Sonata, for example? They've shaved off something like 300 pounds from the previous generation, developped a new 6-speed transmission in-house that uses a lot less parts and weighs a lot less than the previous 5-speed they used, and they introduced Direct Injection to their 4 cylinder engine to increase power while decreasing fuel consumption. How is that not a '3 pronged approach' to improving fuel economy? I honestly don't understand what Mazda's doing here other than finally trying to catch up with its competitors. This is all PR, IMO.
Oh, and I've read a few places that the technologies Subaru puts in their PZEV cars is pretty much the same as those found in other vehicles, they just put a name on these technologies so that people feel better about themselves. Might be wrong, not sure.
Nein. Nein. Nein
Let me show you ze true "EfficientDynamics and "Blue Efficiency". 
Oh, forgot to add ze "BlueMotion".
