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I have made biodiesel with my students. It is a unique fuel, with far better properties than ethanol (IMO). I could spend a lot of time describing transesterfication and biodiesel application, but it would be too lengthy (if you have questions, ask). What I will say, even if it were to be used at only 3% mix (B3), it would provide significant improvements in the emissions from the vehicles using it with possible gains in FE. At 100% (B100), it is much like ethanol, higher NOx and fuel consumption with lower HC, CO, etc. It also is VERY pungent at 100%, like choke you out pungent. If I had a diesel, I would mix at 20-25% for year round consistency to eliminate cold weather problems.
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