Oil burning engine's effect on Catalytic Converter?

Minis are renowned for oil burning. They’re replacing engine due to excessive oil burning. Are O2 sensors and Catalytic converters also effected, and should they replace them as well?

Oil burning can effect catalytic converters and O2 sensors. But I would wait until the engine is installed and the vehicle is on the road to see if the Check Engine light comes with codes that point to a problem with those systems.


Agree with @Tester. If it ain’t broke…don’t fix it.