Much of the ULSD produced in NA meets a less than 10% PPM standard. As a result it can readily be sold in Europe. The production of diesel is increasing while gas production is falling. For the first time in several years diesel prices are below gas in several NA markets. The fall off in offshore demand is a partial factor for this decline. For those interested in a good summary here is a link:

http://www.energytribune.com/articles.cfm?aid=1347