C16 gas w/non-heated O2
 

I filled w/3 gallons of C16 race gas last weekend, at the dragstrip they ran out of the 103 unleaded.
How long before my O2 gets fried? I know non-heated O2s dislike leaded gas.
I made 1 run then after my second burnout my diff. blew at the launch.
Should I get some normal gas to mix as soon as possible?
or is my O2 in need of replacing again? jc