RE: Ultra Low Sulfur Diesel - Anything to worry about????
When ULSD first came out, we in the diesel motor home community encountered seepage problems with gaskets and fuel lines in older engines/fuel systems, roughly pre- 2003. Cummins had problems with the diaphram in the lift pump and initially they sold a replacement diaphram but soon switched over to replacing the whole pump. I was fortunate in that my '02 Cummins ISL did not develop any problems. All of the common RV engine manufaturers - Cat, Cummins, Detroit, saw some seepage problems. I would be very surprised if ULSD did not do the same with marine fuel systems and engines.