Stands for Hydrogenated Vegetable Oil and is a renewable fuel component that can be blended in diesel or used instead of diesel in diesel engines. Hydrogenated vegetable oil consists of a vegetable oil or animal fats refined using hydrogen under the influence of a catalyzer in order to raise quality, turning it into a fuel for diesel engines. Preem’s tall oil, which is found in Preem Evolution Diesel, is an HVO.