17 DIY Cars Hacked for Fuel Efficiency
Boat Tail Beauty
Cardboard, aluminum and duct tape is all Darin Cosgrove needed to get over 15% improved fuel efficiency from his the '98 Pontiac Firefly (that's Canadian for Geo Metro). Cosgrove is the founder of the hypermiling site EcoModder.com. Click to see some clues to the inner working of this duct-tape wonder.
Photo credit: Wired









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