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the only danger with bio is the fact that the regulations for storing and processing are not uniform across the board, because bio attracts and retains water, it's important to make sure your bio is the freshest best quality bio you can get other wise you can do more harm than good.

The chart is great however represents pre ULSD wear scar levels. I'm sure there is an updated chart somewhere.
It's not the biodiesel itself that attracts and retains water, it is the excess ethanol which is not fully consumed in the transesterification process. It's entirely due to process overdosing, which is completely preventable by proper monitoring.
The basic problem is there appears to be no standard enforcement in US biofuel manufacture.
BTW, gasoline with ethanol has the same problem, being hydrophilic, which is why it can be so harmful to two cycle engines.
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