Perhaps I mistakenly assumed making it a little less asthmatic would help efficiency, hence improve gas mileage. Not a radical cam but porting, oversize valves, oversized or dual exhaust, and/or 1.6 rockers.
No, it wasn't a mistake.....it will help. It's just that they'll never be 30 plus MPG beasts, no matter what some people claim. Simply not gonna happen.