BIO IS NOT ALL BAD JMO
Lubricity Benefits
Percent Biodiesel HFRR Scar (microns)*
Number 2 Number 1
0. 0 536 671
0. 4 481 649
1. 0 321 500
2. 0 322 355
20. 0 314 318
100. 0 314 314
*Results provided by Stanadyne Automotive Corp.
For the Number 2 diesel fuel, 1% biodiesel was sufficient to achieve the desired increase in lubricity, while the Number 1 diesel fuel took almost 2%. In addition, the data show that most of the lubricity benefits of the biodiesel were achieved by adding only 2% biodiesel to either Number 1 or Number 2 diesel.
Based on the HFRR testing run by Stanadyne, and testing from other laboratories showing similar results, Stanadyne Automotive has stated:
“…. we have tested biodiesel at Stanadyne and results indicate that the inclusion of 2% biodiesel into any conventional diesel fuel will be sufficient to address the lubricity concerns that we have with these existing diesel fuels. From our standpoint, inclusion of biodiesel is desirable for two reasons. First it would eliminate the inherent variability associated with the use of other additives and whether sufficient additive was used to make the fuel fully lubricious. Second, we consider biodiesel a fuel or fuel component—not an additive…Thus if more biodiesel is added than required to increase lubricity, there will not be the adverse consequences that might be seen if other lubricity additives are dosed at too high a rate. ”
The reasoning behind Stanadyne’s support of 2% biodiesel makes biodiesel an ideal solution to the existing lubricity problem with diesel fuel—while supporting other environmental, energy security, and economic development initiatives. As EPA forces the further removal of sulfur from diesel fuel in 2006, which will undoubtedly worsen fuel lubricity, the concentration of biodiesel can be raised to that necessary to fully protect this future fuel as well.
Additional lubricity testing has been performed on biodiesel at Southwest Research Institute4 (see figure 11 attached) using an updated BOCLE apparatus (Scuffing Load BOCLE), on CARB fuel, EPA fuel, as well as Jet A-1 fuel. Jet A-1 fuel is similar to Number 1 diesel fuel or kerosene. For the Scuffing Load BOCLE, a higher load capacity indicates