Join Date: Jul 2000
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There is a relatively short shelf life for diesel (and gasoline), several months at best. A truckstop usually handles vastly more fuel than a marina; therefore, the fuel is 'fresher', less degraded, has less water absorbed, less fungal spores (the stuff that then grows inside the tankage) ...... than just about 'any' marina.
Large scale marina operations, especially those who cater to 'watermen' will usually have 'almost' the same quality of fuel as a Truckstop. A low-turnover marina, one that only pumps a few hundred gallons per week .... usually dispenses ----- GOO.
Hint - when buying marina fuel, regardless that the price is usually 30-50% more expensive than an automotive source, alway pour a small amount into a CLEAR glass and hold it up between your eyeball and bright light/sun. If there is any 'haze' in the container ..... stop fueling, and go somewhere else as any 'haze' denotes that the fuel has become severely degraded or contaminated.
FRESH fuel is the way to do it and that usually means 'truckstop' or marina that caters to 'commercial watercraft'