The rubber devices used in tire applications requires long-term performance and aging resistance. The resistance to aging effects can be achieved by the use of primary and secondary stabilizers. In this study, the effects of primary stabilizers were evaluated using varying contents of 6PPD (N-1,3-isopropyl-N’-phenyl-p-phenylene-diamine) and TMQ (2,2,4- trimethyl quinoline oligomerized) in an elastomeric formulation used in passenger tires sidewall. The mixtures were prepared with 0.5, 1.5 and 2.5 phr (parts per hundred of rubber) of 6PPD, combined with 0.5, 1.0 and 1.5 phr of TMQ. The rubber compounds were exposed to natural aging and three accelerated aging processes: thermo-oxidative in an air oven, photo-chemical in an UV chamber and ozone exposure. At time intervals, sets of specimens were withdrawn and mechanical properties (tensile and tear strength) were evaluated. Gas chromatography was used to quantify the 6PPD content, before and after aging processes. Natural aging did not present significant changes in mechanical properties. The samples exposed to the thermo-oxidative aging presented the most significant loss of properties and 6PPD consumption, thus indicating the combination of stabilizers that resulted in a better retention of properties: 1.5 phr of 6PPD and 1.0 of TMQ.