Hey bro that was the hole point. It’s not something you would want to run in your engine.

But just in case you did not know 100LL octane burns hotter then 90 octane.
So on track day once every month when your auto x-ing you could stop by your local FBO and fill up your tank and you will run quite a bit faster times. and if you let a car sit for along time it’s not a bad idea to run some 100LL to clean out your engine.
Now I think being in aviation for the last 4 years I would know a little bit about what I’m putting in mine plane.

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To get more in depth when I say fill up I mean mix 90 octane with 100LL.
Now it is true that your catalytic converter would get plugged in time so it would be best to stay away from anything with lead but if you do away with your catalytic converter then running strata 100LL would give you a lot more power with not so many problems.
Next step would be to put some of that Jet-A with priest in that baby.