EN 590:1993âThe first EU diesel fuel specification. It established a sulfur limit of 0.2% and a cetane of 49 in onroad and nonroad diesel fuels. ... EN 590:2004âSulfur limits of 50 ppm (so called Euro 4) and 10 ppm (Euro 5) as regulated by Directive 2003/17/EC. FAME content of 5%