Av Gas 100LL is not appropriate for use in a car unless the car is tuned for it. Other than the lead damaging the O2 sensor, the density of the av gas is different than regular fuel (from memory, there is like a 12-15% difference).
Running 100LL will cause the car to run lean. When mixing it with pump gas, you might be ok.
Av gas is very stable, again, the car must be tuned for it.

 

Both the cam 2 an the 100ll run lean , I have a pump tune and a 110 leaded tune an the AV gas acts like the cam 2