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Add biodiesel to the endangered species list; sign the petition; demand biodiesel compatible vehicles! Get all this and more at savebiodiesel.org.

While true that oil dilution is a known issue in diesel engines, it's hardly "a great threat to the future of biodiesel." Whats more, to say "Most OEMs (including Volkswagen, Ford, GM, and Dodge) are currently using biodiesel-incompatible technology, and they won't change that without public pressure" is a stretch.

At any rate, I recommend having a read. The website is blunt about the effects of biodiesel on engine oil dilution and the suggested remedy is interesting.