Can a car really run on woodchips? This week on Car Talk, we got a call from a rather remarkable gentleman -- Hans, who escaped from Germany during World War II in car that ran on, yes, woodchips.

His question: How does it work? Our humble hosts weren't exactly sure, but we bet someone out there has the answer. What are your thoughts? Anyone have experience with a woodchip-mobile? Let us know!

You can hear Hans' call to Car Talk right here.