According to the National Biodiesel Board (NBB), "The use of biodiesel in existing diesel engines does not void parts and materials workmanship warranties of any major US engine manufacturer."
...FACT: The vast majority of literature out there shows a positive energy balance, meaning that more energy is produced in the fuel than is used to grow the crop, press the seeds, process the oil into biodiesel, and distribute the product.
...FACT: According to the University of Minnesota in 2006 (1), the production and use of soybean biodiesel decreases life-cycle greenhouse gas (GHG) emissions by 41% over regular diesel, and also decreases other pollutants like Carbon monoxide, PM10, and SOx.
...All major pollutants are reduced dramatically in biodiesel exhaust (most of them at least 50% for B100), except one (NOx), and that's only for blends over B20 (see my post on the subject).
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