HVO (Hydrotreated Vegetable Oil) generally offers fuel efficiency comparable to conventional diesel. Fuel consumption is closely related to the fuel’s volumetric energy content, which for HVO is slightly lower than that of fossil diesel. However, due to its cleaner-burning properties and high cetane number, some engines may experience slightly improved combustion efficiency, which can offset the minor difference in energy content. In practice, most users notice little to no difference in fuel efficiency, and in some cases, a small improvement.