You can see how he calculated that coefficient over at his website .

Guy Adds Boat Tail To Car, Increases MPG By 15. 1: TreeHugger

You can see how he calculated that coefficient over at his website . It’s doubtful you’ll see this on a production model anytime soon, if ever. Above: The start of D. His only concern would be other cars running into him. This 14 hour project has given Darin such amazing results that he will be working on creating a more durable and permanent version for his vehicle.

Send us pix of your car. Send us pix of your tattoos. The only effect on driving is I have to watch out for rubberneckers in other cars. The boat tail mod took him about 14 hours to complete.