Can Burning Engine Oil Damage the Catalytic Converter?

[LeBennett]

Burning engine oil can damage the catalytic converter, which serves as an external purification device installed in the vehicle's exhaust system. It converts harmful gases such as carbon monoxide, hydrocarbons, and nitrogen oxides emitted from the vehicle's exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. Maintenance tips for the catalytic converter: 1. Avoid using leaded gasoline; 2. Avoid prolonged idling; 3. Do not let the engine speed fluctuate rapidly; 4. Avoid excessively delayed ignition timing; 5. Do not test for spark by pulling out the high-voltage wire for extended periods; 6. When measuring cylinder compression, disconnect the fuel pump's central control connector; 7. If any cylinder is found to be malfunctioning, stop the vehicle promptly to inspect and rectify the issue; 8. Do not disassemble it arbitrarily—ensure any replacement matches the engine specifications.

[McRhett]

Burning engine oil can indeed damage the catalytic converter. From an automotive construction perspective, I understand that the residues produced by burning oil, such as metal particles and carbon deposits, can adhere to the internal surfaces of the converter. Over time, these deposits can clog the channels and reduce purification efficiency, potentially triggering warning lights or excessive emissions. Common causes include worn piston rings or aging valve stem seals. If not addressed promptly, the catalytic converter may fail and require replacement, which can be very costly. I recommend regularly checking oil consumption—for example, if the dipstick shows an abnormal drop in oil level or if blue smoke is visible—and immediately visiting a professional repair shop. Don't underestimate this issue; prolonged neglect can lead to much higher repair costs.

[AryaLee]

I've repaired too many cars where burnt engine oil destroyed the catalytic converter. The ash from burnt oil coats the honeycomb structure of the converter, essentially clogging it up. This prevents exhaust gases from passing through, causing a complete loss of purification capability. Customers often wait until the dashboard warning light comes on before seeking repairs, only to be forced into replacing the entire catalytic converter - a costly waste. Remember: If you notice rapid oil consumption or a burnt smell, stop immediately and inspect engine components. Prevention is always cheaper than repairs. Practice smooth driving habits and avoid overloading the engine. Addressing issues early prevents chain reactions and saves significant money.

[SanEmilio]

My car once experienced engine oil burning that damaged the catalytic converter, and the consequences were terrible. The burnt oil residue clogged the inside, and after the catalytic converter failed, emissions exceeded standards. Since then, I've learned my lesson: as soon as I notice oil shortage or blue smoke from the exhaust pipe, I immediately address the engine issue. Otherwise, you'll end up spending thousands to replace the catalytic converter like I did. Paying attention to these details in daily car use can save both hassle and money.