It is estimated that only 40% of an oil reservoir can be removed by simple pump and flooding methods. This is due to the viscosity and adhering to the substrate in the reservoir. Testing indicates that the surfactant and emulsifying properties of rhamnolipids can be used to recover and additional 40% of the remaining oil in a well. This Enhanced Oil Recovery (EOR) that may facilitate the doubling of the petroleum recoverable from an oil well or tar sands over traditional methods in a much more environmentally friendly manner.