Extra O2 sensor for running leaded gas?

[Atlantonius]

Well, I finally put in my new O2 sensor and still have the old one. Question is, if I keep the old one, can I still run leaded gas if I swapped that one back in? I have no Cat, so other than fouling up the O2 sensor, is there anything else I may screw up by running leaded fuel?

On that same note, is there something else that I should run other than leaded gas in order to get upto 114/116 octane?

[Yareka]

just run the 100octane unleaded. Chances are that you arent getting any benefit even on timing 9 running the leaded gases. It will keep you from having to switch out or eventually killing an $80 sensor.

[a4wdhybrid]

ive run leaded several times over again

both w/ a narrow and wideband sensor in the downpipe

no issues

but if youre really that worried about it..get unleaded like yareka said

[Atlantonius]

the old sensor still works, however, the car seems to run richer with it in compared to the new sensor that hasnt been exposed to leaded gas.

I think I will just stick with 100 unleaded and just do some timing logs to see if there is any pull @ timing 9.