Buck's Right
By comparison, sailboats use very little diesel fuel in the course of a season providing the wind is blowing. Power diesels use, obviously, a lot more, but not as much as Big Rigs. However, it appears to me that there is much known in boating circles about benefits of biocides and cetane enhancers along with water dispersants and other additivies. I use maybe 50 gallons of diesel fuel a year, use the additives which are commonly available at most boating supply stores -- one generally seems as good as another -- and change my oil and filters regularly. You're right, too, Peggie, in your approximation of diesel engines being diesel engines. They are all about the same, except in size and power, of course, and they all run on the same principles and diesel fuel is essentially diesel fuel the world over, the quality, of which, varies. Outside the U.S., and at most marinas in Mexico and Caribbean, diesel is delivered in translucent barrels a lof of the time. It's a good idea to let the barrels sit for a spell before pumping them right into your tanks! You'd be surprised how much water collects in the bottom.In the Bahamas, we pump fuel through a stand-alone set of filters just to be on the same side.