The off-road explination is the same here in PA.
The Marina fuel is a different animal and is only available in two places on our bay. The one I know for sure sells diesel that has Valvetec (sp?) additives in it. Supposedly every gallon has a biocide and Cetane additive along with other good things. I "assume" that the diesel fuel comes from the same retailer and that the Valvetec additives go in the tank at the marina?