The Fuel That Came In From The Cold

Efforts to meet increasingly stringent emissions standards have also led to the development of ultra-low-sulfur diesel (ULSD) which may exacerbate the problem. Sulphur is a natural part of the crude oil from which diesel fuel is derived, and one of the key causes of particulates, or soot, in diesel. Last winter, Russian ULSD was suspected of causing a number of problems for motorists.