Tim wrote:
Wayne and Richard, you're both correct. Richard I'm glad you had the
diesel polished, for peace of mind. That didn't hurt a thing.
Wayne, you're also correct that quality diesel fuel will last for years.
Where the problem lies is when operators will use 'bio-diesel' the mucky
algae loves that stuff! In a few months the junk starts growing and it
clogs filters and can foul the tank and fiel lines.

Engines run great on bio-fuel but it can't sit long. You find it mostly
sold at truck stops. marina's use the good stuff for that reason...

Regular diesel as well as kerosene will grow critters if water is present.
Alaska fishing boats have a, I think it is called, a day tank. The regular
tank feeds the day tank. Keeps you from having a huge mass of dirty fuel
feeding the engine. I think the day tank allows the stuff to,settle, as
to kerosene, they use to separate different products going down a delivery
pipeline with a water slug. They military had some jet crashes. Was
plugged filters from critters. The water slug allowed enough water in the
fuel tanks to grow the biological.