Straight Vegetable Oil

SVO is a reference to refined/polished UCO or refined fresh oils which are used to fuel diesel engines.  In this case, oil is not processed into biodiesel, rather oil is (generally) heated to reduce viscosity and is then used directly as diesel fuel.  UCO/WVO that has not been processed to remove particulate and water is not suitable for use as SVO.  Oils with high FFA are also not advisable to use as SVO as this may damage equipment like injectors. People running SVO generally have some type of conversion kit installed which heats oil, either in tank, by injector/fuel line, or both. The picture on the right, at the bottom, is an example of what SVO quality UCO looks like. This product has FFA about 1-5% max and MIU generally <1%.