I stop using Av Gas, not 100LL, in my race cars back in the mid 1970s after seeing the pitting the valve seats and valves it caused in high RPM motors, above 4000 RPM
I have used some 100 LL in some other Hi Po street cars since then due to it having shelf life of 18 months, it has a noticeable distinct smell that some law enforcement officers can notice, it has a $10,000.00 Federal fine on using it on the street due to the lead content, if they want to write you up for that
I owned and flew a small airplane for a little over 15 yrs, spent around 900 hours in flying it with using 100 LL only fuel in it.
Before leaded additives where outlaw for street gasoline there was three different blends of Aviation gasoline in the 1970s, 85/100, 100/115 and 115/145 which later became 115/130 octane. I use the 100/115 in my race cars back then