That's kinda where I was going with my theory of rewarding those with smaller-engined, lighter cars wih a big tax incentive.
BTW, that's a darn good engine management system. Whose engine actually is a Ford 4-cyl, nowadays?
The 4-cyl engine in that '98 Ford Contour (2.0L Zetec) is a Ford engine.
The current 4-cyl Duratec engines (I don't know if the Zetec is still in production) are a joint Ford-Mazda design.
Actually "joint Ford-Mazda" is kinda redundant since Ford owns a controlling interest in Mazda..