Anyone ever use 100 Octane? or anything higher.....

I was thinking of trying 100 Octane just for fun one day, in my stock 92z, would i notice any difference? Or is it just bad to do this....

 

The only place I'm aware of that you can commonly get 100 is avgas, and it's 100 LL (low lead). This means that there is still some tetraethyl lead in the compound, and it will foul you oxygen sensor(s) and cat converter(s).

If you've found a source for 100 race gas that is truly lead free, you can try it, but I doubt you'll see any changes except for a lighter wallet and possibly a little less power.