The XL1 hypermiler mates a carbon chassis and carbon ceramic brakes with a 68 hp two-cylinder diesel hybrid motor
It was brought from the Lane Museum by Brett Mellancon along with the Alfa Romeo SZ Coupe. I suspect Brett is on his way back to Knoxville.
I believe it is now being driven from coast to coast by Jim Magill who has taken a rare or unusual car from the EU across the US. I believe several of those cars have ended up at the Lane Museum. Jim does this to raise money for charities. He blogs the trip. This is his page for this year: