Engine conversion kit allows diesel vehicles to use vegetable oil

When inventor Charles Anderson goes to fill his tank, he's filling it up with a fuel that's got some flavour, vegetable oil.
"One of the unique things of burning vegetable oil as a fuel is that your exhaust will smell like whatever was cooked in the vegetable oil."

Charles is using old French fry oil in his diesel gas tank, but go pouring left-over oil into your tank just yet. It takes a conversion kit like the one Charles has developed.
"What we do to take vegetable oil and make it into a suitable fuel for a diesel vehicle, is we heat it up. We do that by taking the waste heat that the engine is already producing."
First the engine warms up. Then, a switch on the dashboard starts the veggie oil flowing from a separate tank and fuel line. Within a few minutes the vehicle is running on vegetable oil.
"When vegetable oil heats up, it gets runny, and it becomes a similar viscosity to diesel."

Vegetable oil-powered vehicles have lower emissions than gasoline powered cars, and Charles says they might even give some cars or trucks a boost. "The increased lubrication of the vegetable oil actually will give you just a little bit better fuel economy and give you a little bit more power."
So, that faint odour of French fries may not be from the drive-through. It may be from a driver. Vegetable oil conversion kits start at about $ 500 dollars.