A conventional diesel fuel (B4-5) was used and compared
with the results of biodiesel fuel derived from palm-olein
(B100: TIS 2313-2549). Distillation curves (Temperature-
Vaporization) of both fuels are shown in Figure 1. It was
clearly observed that diesel fuel could be distilled in wide
range of temperature due to fossil fuel consisted of much
kind of molecules whereas biodiesel is quite pure molecule
resulting in vaporized at the constant temperature. The
vaporize temperature of biodiesel is higher than that of
diesel. Therefore, the high temperature inside the biodiesel
engine combustion chamber will be reduced.