Diesel engines were designed to run on Vegetable Oil. Modern diesel engines, however, have fuel systems designed to spray fuel that is much thinner than vegetable oil. Trying to spray unheated vegetable oil through an injector designed for diesel is similar to trying to spray maple syrup through a Windex bottle. An improper spray pattern will result in incomplete burning of the fuel. This in turn will result in carbon deposits being formed in the engine which will over time destroy the engine.

Diesel Alternatives: Bio-Diesel, Modified Injectors calibrated for vegetable oil thickness, or on board Vehicle pre-heating of the vegetable oil to lower its viscosity.

The simplest of these solutions is to heat it up. As you can see from the information presented in the graph, when vegetable oil has been heated to 160F its viscosity is very close to that of petroleum diesel. The SoyCar answer is to sell and install kits that heat the vegetable oil up. It's really that simple!