Vegetable Oil

Vegetable oil can power a diesel engine after just a few simple modifications, turning junker cars into low emissions vehicles. Before use, vegetable oil must be put through a conversion system so that it is heated to the appropriate temperature to properly run an engine, but once users get the hang of the process, there are many benefits beyond the low emissions.

Because both unused and used vegetable oil work to fuel a car, people who convert often brag about never having to pay for their fuel, instead relying on the never-ending supply of used cooking oils from restaurants.