So far it sounds like Biobor is #1 with Stanadyne coming in at #2. If I read the comments correctly Biobor is more towards dealing with water caused bacteria and algae. Where Stanadyne is aimed at keeping the diesel dry and the engine fuel system components clean. I wonder if you can use both? I appreciate everyone's input. It's one of the ways to learn things about this boating stuff. For me anyway.
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