Run a Diesel Vehicle on Vegetable Oil

With a few modifications, you can run a diesel vehicle on vegetable oil to power your car or truck. People across the country are using conversion kits to retrofit their vehicles. Others are taking a do-it-yourself approach. Some burn free waste vegetable oil from local restaurants; others burn clean straight vegetable oil. But there’s a catch: Technically, it may not be legal.

Marcos Markoulatos and Ty Martin, of Lawrence, Kan., both run their trucks on filtered waste vegetable oil.
Marcos Markoulatos and Ty Martin, of Lawrence, Kan., both run their trucks on filtered waste vegetable oil.
Photo by John Hardesty