One of the most commonly used supercritical fluids is carbon dioxide (scCO2) which is non-toxic, non-flammable, abundant and has an easily accessible critical point. An application in which scCO2 has found success is in the enhanced oil recovery (CO2-EOR) of crude oil from porous materials. However, one disadvantage of using CO2 in EOR is the fact that its very low viscosity does not readily facilitate its transport over oil bearing rock but rather through porous media which offers the pathway of least resistance. Recently it was shown that the addition of hydrotropes to water-in-scCO2 microemulsions of TC14 could cause an elongation of the microemulsion droplets and sphere-to-ellipsoid transitions with calculated viscosity enhancements of up to 16 %. It is now proposed to extend this study to include fluorinated surfactants where the viscosity enhancements should be far greater.