The catalytic converter is a stable and basic equipment which does not need any type of maintenance though there are some important facts which the owners ought to know to guarantee its correct operation during its service life. In the case of petrol models, it is important not to use leaded petrol in which case lead may form coating of the precious metals and reduce its efficiency hence destroying the converter. It is important to maintain the ignition and fuel systems in good condition as per the schedule of the manufacturer. In case of misfiring of the engine, the driving should be reduced to the minimum until the problem is fixed. It is always not recommended to push or tug the car, because it may soak the catalytic converter with the unburned fuel that will then cause over heating when the engine is started. Also, one should not turn off the ignition on the highest engine speed but use fuel or engine oil additives should be discouraged because of the possible harmful substances. The vehicle should not be used in case the engine burns oil to the extent of forming blue smoke. Finally, the catalytic converter works under extremely high temperatures, therefore when the car is parked in dry undergrowth, long grass, and even heaps of dead leaves after a long run, it is advisable not to park the car.