Can poor engine maintenance e.g., delayed oil changes o r dirty spark plugs contribute to catalytic converter failure in the Alsvin?

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Can poor engine maintenance e.g., delayed oil changes o r dirty spark plugs contribute to catalytic converter failure in the Alsvin?

How does incomplete combustion lead to excessive carbon and converter clogging?

Lubaba asked on 11 Jun 2025 18:14:55 pm

1 Answer

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Car Mechanic Expert - on 11 Jun 2025 18:19:05 pm

Definitely. Here’s how:

Dirty spark plugs = incomplete combustion = unburned fuel enters the exhaust.

Old engine oil = increased blow-by gases = higher HC emissions.

These gases clog the converter o r cause overheating that melts internal components.
So keeping the engine in tune is critical to extending catalytic life.