There is a growing movement towards the use of renewable sources of energy. One viable option is using vegetable oil to run diesel-powered vehicles. Enthusiasts and purists prefer the use of waste vegetable oil (WVO) because it is the cheapest option and at the same time, it is a form of recycling. However, there are technical issues which must be considered before jumping into the bandwagon.
The diesel engine was originally designed to run on vegetable oil. But as the petroleum industry grew, diesel fuel became the standard by which future designs of the diesel engine was founded into. Since diesel fuel and vegetable oil have inherent differences in properties; all available solutions center on improving viscosity and combustibility of vegetable oil.