The trend of exploring new sources of fuel for automobiles is increasing over the past decade, where the use of biodiesel as alternatives for fossil fuels is investigated exclusively, due to its potential of decreasing greenhouse gas and air pollutant emissions. Production and use of biodiesel can encourage the agricultural industry and provide self-reliance on automobile fuels which in turn boosts regional economic development. Biofuels or biodiesel is widely used as hybrid fuel in more than 20 countries around the world with an account annual consumption of over 2 million tons  [ 1 ] .  Figure 1. Credit to SNB. As an example in this context, considering the Hong Kong region, the increasing interest among the public to reduce air pollution drives them to use biodiesel as fuels. The environmental protection department of Hong Kong has conducted a feasibility study at the University of Hong Kong on the use of biodiesel as an automotive fuel in Hong Kong. The main motivat...