... back to tuning; im thinking a supercharger might just do to a gas engine what diesel engines do.
Supercharge a smaller engine will add more hp & torque, using less gas; so you could get a 190 3.2 L gas engine add super charger to make er into a 280 hp with more torque ...
i always thought of concocting some sort of quick-connect, removable front lip spoiler, like the GM full size trucks have. i could've sworn i read somewhere that when those guys removed that lip, their highway mpg's dropped.