Straight Vegetable Oil - Definition, Glossary, Details - Oilgae
Pure vegetable oil must be processed before it can be used as a fuel. The oil must be first filtered to a minimum of 10 microns, dried (to less than 1% water), degummed, fatty acids removed, and heated to >167 degrees F. To run the vegetable oil in a diesel engine, a fuel heating system and additional fuel filters are also required.