EN 590 Gas Oil is a 10 ppm (parts per million) sulphur content gas oil. It has a higher cetane number than A2 Class Gas Oil (another 10ppm sulphur content class of red diesel), making it better suited to internal combustion engines in off-road vehicles.
Petroleum coke, or petcoke, is a product produced from all types of oil (light/heavy crudes) during the oil refining process. Many different products are extracted from a barrel of crude oil in addition to gasoline, diesel and jet fuels. Petroleum coke just one of the many.