The use of La-based, Cu (LCO), Mn (LMO) and Fe (LFO) perovskites doped with Ag was studied for potential application as cGPF soot oxidation catalysts. Special emphasis was placed on the effect of the soot, reaction gas composition, changes in rich/lean conditions and the resulting physicochemical changes in the catalyst and their reversibility. The use of a catalyst reduced the soot oxidation temperature significantly in a low-O₂ environment and with Ag doping the soot oxidation temperature was decreased by 170 °C in loose contact and 230 °C in tight contact compared to uncatalyzed oxidation. For the soot oxidation in an O₂-free environment, the highest oxygen storage capacity was found for LCO and LCAO (1 mol O per mol_cat). The release of such a high amount of O and reduction of Cu²⁺ to Cu⁰ was accompanied by the loss of perovskite structure (LCO → Cu/La₂O₃), which could be reversed following exposure to a high temperature low-O₂ environment.