Maruti Service stations offers decarbonising (optional) ,that removes Carbon in the Engine. I think that is why same engine in their cars lasts longer than in Fiats! anyway After the replacement of Timing chain at 52 k in our punto(2011 model) we have scared of this type of failure. The Service quality of new FASS is very poor in our city. So We sold our Punto and changed to used Ritz 2011 model. I know the quality of maruti is no where near fiats but we opted it for peace of mind.