Black Light Diesel OIl (LDO) for Industrial Fuel Heating Oil and Low Power Oil Light diesel oil (LDO) is a distillate fuel created during the distillation of crude oil. In terms of viscosity and refining complexity, it falls between gasoline and heavy fuel oil. LDO is lighter and less dense than heavy oils, but it is more dense and viscous than high-speed diesel (HSD). Usage Examples and Applications LDO is widely used for: * Industrial Heating : Fuel for furnaces, dryers, and air heaters. * Boilers : Used as start-up fuel or as the main fuel in boiler systems. * Diesel Generator Sets : Power generation, especially in low-speed and medium-speed engines. * Agricultural Equipment : Powering large farm machinery. * Non-Automotive Engines : Machinery that does not require the high-speed, low-emission specifications of automotive-grade diesel.