E Enhanced Oil Recovery is the way to increase hydrocarbon production by re-produced residual oil that still trapped in rock pores that called residual oil saturation.One of the methods that commonly used to increase oil production in this research issurfactant injection. This research had been done in EOR Laboratory of PetroleumEngineering, Faculty of Earth Technology and Energy, Trisakti University. The usedof surfactant type in this thesis is Alpha Olefin Sulfonate (AOS) with theconcentrations are 0.15%; 0.25%; 0.35%; 0.5%; 0.75%; 1.0%; 1.5%; 1.8% and 2.0%.The used of salinity is 10,000 ppm. This research is also using 3 (three) compositionsof oil combination between kerosene and paraffin, and temperature as parameter,which is 28oC and 70oC. Based on the laboratory study, by adding surfactantconcentration, the value of density, specific gravity, viscosity and interfacial tensionhad increased. Otherwise, by the increasing of temperature from 28oC to 70oC, it willbe caused the decreasing of density, specific gravity, viscosity and interfacial tensionof fluid. By the measuring of interfacial tension on 28oC temperature, it has the resultof Critical Micelles Concentration (CMC) that formed at 1% concentration on 70oCtemperature, CMC formed at 70°C temperature. On 28oC, the maximum recoveryfactor (RF) is on 8%, meanwhile on 70oC, the maximum recovery factor is 9%. It isall because of the heating on 28oC, so the RF is increased for 1%.