The market is divided into two categories based on the product: distillate fuel oil and residual fuel oil. By 2027, the distillate fuel oil category is predicted to command the greatest market share. Distillate fuel oils are cleaner and more expensive per gallon than residual fuel oils. Distillate fuel oils are known to release low quantities of nitric oxide (NOx), particulate matter (PM), and sulphur dioxide when burned in a boiler (SO2). These are the main advantages that will propel this segment’s expansion in the global market over the forecast period.