Pay Dirt: How to run a car on vegetable oil

Ryan DeWald of BioCoupe in Madison, Wisconsin explains the process of converting a diesel engine to run on vegetable oil, and takes us on a tour around town to collect waste vegetable oil from several restaurants.

Produced and directed by Tona Williams
Featuring Ryan DeWald
Music composed and performed by Andrew Yonda of The Buffali

Get a copy of the film
on the Earth Walls DVD