We first learned about Mike Turner's AeroCivic on the EcoModder forums (a community of people trying to get the maximum fuel efficiency from their cars by modifying them). It is a DIY project based on a 1992 Honda Civic CX that was started after hurricane Katrina because of high gas prices. The shape is based on a streamlined 1939 Maybach (pictured on top), it gets 95 MPG (US gallons) at 65 mph, and its coefficient of drag is about 0.17, which is much lower than the new 2010 Toyota Prius hybrid at 0.25.
Photo credit: Top, public domain. Bottom, Mike Turner