It cost more than regular fuel.
it is more expensive
its renewable
The disadvantages of biodiesel include a decrease in horsepower and a large amount of land devoted to growing the crops to create the fuel. Another disadvantage includes the fact that the fuel gels in cold weather.
Because
Biodiesel is important as using it slows global warming. Biodiesel, made from vegetation and algae, is used for powering vehicles and machinery instead of using diesel, which is a fossil fuel causing global warming.
Cost, it's less efficient than ULSD, conversion to biodiesel is expensive, it gels more easily than ULSD does.
Because its disadvantages far outweigh its advantages. ULSD motors require expensive conversions to run on biodiesel (contrary to what seems to be popular belief, you don't just pump biodiesel into any ULSD motor without conversion), and it doesn't perform as well as ULSD #2 does.
Tallow is rendered mutton, beef or other bovine fat. Biodiesel can be made from tallow using similar methods and processes to plant oils. The resulting biodiesel has a higher cetane number than plant oil biodiesel meaning a cleaner and more efficient fuel.
Biofuel is organic, cheap, good for the environmet, and made from plants grown here in the US. Biodiesel is recycled oil that can be used to run cars and plains but it is not organic and the reproduction is not good for the environment at all and can be a bit more expensive. All in all they both have their advantages and disadvantages.
It would be great if more people used biodiesel in the diesel trucks! However, at least in Michigan, you can not legally sell the biodiesel you make at home and many people do not want to put the time and effort into making it themselves. There are a few negatives to using biodiesel in diesel trucks. First, there is limited availability of biodiesel fuel. Next, the cost is much higher for biodiesel. Also, fuel economy is off by at least 10%. Additionally, biodiesel may be a concern in cold weather and in older vehicles.
What are disadvantages of using car?
Biodiesel