Is it OK to mix in leaded gas when using FAST w/ WB?

[fast4d]

I'm using 100 unleaded.

I would like to mix in a little leaded 113 octane gas before going to the dyno or track.

Will this harm the WB O2 sensor? Since closed loop is dependent on it I'm a little worried.

 

[TurboTR]

Leaded race fuel seems to be a-ok with the FAST wb. FWIW I'm still on the same sensor after 3 yrs with C-16.

TurboTR

 

[bruce]

Originally posted by TurboTR
Leaded race fuel seems to be a-ok with the FAST wb. FWIW I'm still on the same sensor after 3 yrs with C-16.

Any street driving?.
Or any idea of how many hours, or miles with the leaded.

 

[Craig Smith]

We have yet to see a single lead-fouled sensor. Lots of carbon fouling, lots of oil fouling, but no lead.

I never used anything other than leaded fuel in my own car and my sensor looks as good as a sensor out of a 87-burning daily driver. I'll be using that same sensor with my new engine, which burns methanol. That works fine too.

 

[fast4d]

if Craig says it's OK all my worries have gone. Thanks everyone.