Article by Bill Hezlep.
... The third leg – clean diesel fuel – is more of a problem. If you use your boat hard – drive it south for the winter, do the Great Loop, make those two-week cruises, regularly fish offshore, pull traps every day – contaminated diesel fuel becomes a fact of life that falls under the heading of Sooner or Later it Will Happen. Sooner or later you’ll get some dirty diesel.