Cost
The use of Biodiesel contributes to a healthier environment. 

It has been demonstrated that “B-20” used in a commercial bus fleet resulted in nominally lower operational costs*.  The purchase cost of Biodiesel itself varies with its source:

a.  Direct from an agricultural source, such as soy, will vary with the market driven levels of a demand market.

b.  From a renewable source, specifically “yellow grease”, collected from restaurants (including hotels, schools…) is a valuable resource, since it is not dependent on agri-market fluctuations, and is more cost efficient.

Both of these sources—agricultural and renewable,, produce Biodiesel to the same EPA standard (“ASTM……).