Bio diesel is a form of diesel fuel manufactured from vegetable oils, animal fats, or recycled restaurant greases. It is safe, biodegradable, and produces less air pollutants than petroleum-based diesel. Bio-diesel can be used in its pure form (B100) or blended with petroleum diesel. Common blends include B2 (2% biodiesel), B5, and B20.
Bio diesel Compared to Petroleum Diesel- Domestically produced from non-petroluem, renewable resources
- Can be used in most diesel engines, especially newer ones
- Less air pollutants (other than nitrogen oxides)
- Less greenhouse gas emissions (e.g., B20 reduces CO2 by 15%)
- Biodegradable
- Non-toxic
- Safer to handle
| - Use of blends above B5 not yet approved by many auto makers
- Lower fuel economy and power (10% lower for B100, 2% for B20)
- Currently more expensive
- B100 generally not suitable for use in low temperatures
- Concerns about B100's impact on engine durability
- Slight increase in nitrogen oxide emissions possible in some circumstances
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Source:fueleconomy
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