Google:
BSFC: Brake Specific Fuel Consumption
Carnot Efficiency Cycle
These are the two main fundamental engineering terms (there are more) which MUST be improved before you can expect to see any significant improvements in overall MPG. As far as I can tell, the new V8 makes no attempt to improve these over the V10. Although it has less moving parts, it has more cubic inches than the V10 so unless there are improvements in efficiency, expect no better MPG. A direct drive transmission is most efficient, adding gears adds drag which beyond a certain point will reduce fuel mileage since it adds complexity. IMO, the new V8 is about cost saving, not fuel saving.
Chum lee
