You know the kind of odd part here ... either way the money for all this doesn't really exist and probably never will.
I rented for work a Chevy Aveo (sp?) and with all highway driving it got 26.7 mpg.
2008 Chevy Aveo
Highway driving 95% City 5%
Mileage 283.6
Gallons at Fill Up 10.590
MPG 26.7
Pictures:
Chevrolet | 2009 Aveo - Vehicle Photo Gallery | Chevy Aveo
Small car with horrid gas mileage imho. The Ford Escort I had to rent (grandma car for sure) made it from Melbourne to Clermont to West Palm Beach to Melbourne all on one tank. Not so much with this car; same trip as the previous one and I HAD to fill up in West Palm and I have to again to take it back to the rental agency.
The sad part when I Googled this car, people thought its gas mpg was great. If they knew what my Civics are getting with the bhp they have ... i bet they would change their minds.
Completely unimpressed.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
http://www.flickr.com/photos/8341770@N07/5601083432/http://www.flickr.com/photos/8341770@N07/5601083432/ by http://www.flickr.com/people/8341770@N07/, on Flickr
I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production