Morgan Freeman, with the filmmakers and their Greasecar

Picture a cross country road trip powered by vegetable oil in a 1981 Mercedes Benz. Greasy Rider follows two filmmakers, Joey Carey and J.J. Beck, as they meet with fellow Greasecar drivers, friends and critics. Traveling as far south as New Orleans and as far north as Seattle, the car is powered by used cooking grease collected at restaurants along the way.

Interviews include Morgan Freeman who is opening up a biodiesel plant in Mississippi. Political analyst Noam Chomsky, "You're supposed to believe we would have liberated Iraq even if its main product was pickles," appears alongside Yoko Ono, "This whole world is now ruled by corporations and their greed," and Tommy Chong, "You guys figured it out. You got your little bio-car, and there you go." Additional interviews include the founders of four vegetable oil conversion kit companies, Greasecar, Greasel, Plant Drive and Frybrid, as they discuss the viability of vegetable oil as fuel.