16. We’ve been doing this for years! Chevy Volt Ford Pinto ( Modified by Car and Driver) http://ecomodder.com/blog/11-on-mods-plus-new-tires-car-and-driver-improves-mpg-by-25/ http://www.youtube.com/watch?v=kMGZca0PpG4
17. Nissan Versa with front grill block and boat tail. Fuel economy: EPA 29 mpg This car: ~39 mpg! Photos Courtesy of skyl4k of ecomodder.com