This study describes electromagnetic heating of oil using curve transmitter with magnetic feeders in the radio frequency region. The transmitter was developed to focus the electromagnetic waves to the target. A series of experiments were done to find focus point of electromagnetic waves by using curve transmitter with magnetic feeders in water tank filled with brine at 15 salinity. The center of the transmitter has 184.4 higher magnetic field strength as compared to both end of the transmitter. Three magnetic feeders had resulted approximately 210 increased of magnetic field. The porosity and permeability of the core samples were also measured. Oil saturated core rock samples were kept in tank filled with brine of 15 salinity for efficient oil recovery. The EM waves emitted by the curve transmitter with 3 magnetic feeders were able to recover 43.71 (sample 1) and 59.26 of OIP (sample 2). © 2011 Asian Network for Scientific Information.