I think I remember hearing about this a year or two ago on NPR. I remember they said it smelled like french fries or something. Probably gain 2 pounds a day just driving to work! Might have a better market overseas. I know I wouldn't do it.
and they reccommend using oil from chinese restaurants, so you would be a rolling billboard for your local china dragon cafe! mmm general tsao's chicken- i gotta go eat.