Many researchers have extensively studied fluid resistance and compression set behavior of rubber and rubber blend compounds loaded with different filler I14-18] The effect of carbon black load- ing on the percentage of the compression set and swelling rate of SBR and NBR rubber compounds needs to be understood deeply. Therefore the aim of this paper was to determine the effect of car- bon black loading on the percentage of the compression set and swelling rate in motor oil at different temperatures on SBR and NBR rubber compounds.