Next Miata to Be a Prius-Killer?

Looks like Mazda’s planning a mechanical revolution with the 2011 MX-5 roadster.  Inside Line and Leftlane are reporting that the ’11 Miata will be able to achieve 70 mpg.  The astonishing number comes courtesy of a normally aspirated 1.3 L I-4 called the SKY-G.  What’s even more shocking about the claim is that the engine will still produce around 150 hp, while helping to keep weight down to a mere 2,200 lbs.