Power Service Products, a producer of diesel fuel additives, launched a website for boat owners at home or at sea: MarineDieselAdditives.com. By EPA mandate, boat owners are required to use Ultra Low Sulfur Diesel (ULSD) fuel, where the sulfur content has been lowered to no more than 15 parts per million (ppm) from its previous maximum allowable content of 500 ppm. ULSD burns cleaner than higher sulfur fuels, but it also reduces the fuel’s resistance to microbial contamination, shortens fuel storage life and impacts engine performance.