..

 

If that's the first time you've put leaded gas in your car I wouldn't think it'd caused much damage to your o2 sensor / cat.

Do you have a CEL?

 

It will take a long time to dammage the 02 but the cat is what the problem is. You most likely
trashed the cat. I have been running c16 leaded for a year now and the 02 is still fine.I have no cat.

 

Yup, the cat is trashed but the O2 should be fine. The damage isn't due to high heat and melting, it actually is from the lead itself rapidly depositing on the catalytic matrix material completely plugging the passages.

Later,

Keith