I read the same info Ian did. Cat haven't done 1000k so far from ageing. My problem I believe and correct me if I'm wrong is that I have a possible injector fault and cheap **** downstream post cat sensors ( Lesson learnt). The only trim that is not functioning with the 10% working parameters is LTFRM1 Which has been 11.7/12.5% solid. That info comes from the scan tool. When I receive the sensors and install I will post any changes. If none injectors will be coming out but probably should be cleaned anyway.