Figure 5 and figure 6 represent the variations of brake 
specific fuel consumption (BSFC) with brake power for 
all fuels at without and with EGR condition respectively.
For all fuel blends, BSFC is found to be decrease with 
increase in load. This is due to the higher percentage 
increase in brake power with load as compared to the 
increase in fuel consumption. Using B10, BSFC of the 
engine is lower than that of diesel for all loads and for 
B15, BSFC almost same. In general the BSFC is found 
to be greater with biodiesel because of its lower 
calorific value. It is noticed from the figures that, with 
EGR condition reduces the BSFC. It could be the effect 
of re-burning of charge, increase of intake charge 
temperature which increases the combustion velocity.