Heres my short list of the pros and cons of biodiesel as I see them
Pros:
1. Cleaner emissions (which smell better too), up to 75% less carbon.
2. Better lubricity
3. Grown in the US
4. Makes the engine run quieter and smoother
5. Close to carbon neutral

Cons:
1. Lower energy per volume than petro diesel
2. Higher NOx emissions, up to 10% more than petro diesel
3. Winter time gelling problems.

I started a quite a while ago that asked the same question, pros and cons of biodiesel, but I can't find it. I search some more and post it if I can find it.

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