Background: Biofuels are one of the promising alternative fuel sources for automobiles.
The use of biofuels in combustion engines of automobiles showed many advantages and disadvantages.
Methods: In this study, the advantages and disadvantages of using biofuels in internal combustion
engines are reviewed and summarized based on early studies.
Results: Biofuels can offer favorable well-to-wheel CO2 balance in our environment and improve
engine power and efficiency. Oxygen contents in biofuels also provide advantages for the fuel combustion.
However, biofuels, also showed some disadvantages, like corrosiveness to engine systems
and low heating values of biofuels. Boiling temperature, absorption with water, vapor toxicity, and
autoignition of biofuels showed advantages for some types and drawbacks for others.