Any replacement fuel is initially going to cost more. Even UL94, which supposedly is 100LL without the lead is more. It’s all about volume. If enough places start selling enough of it, prices will come down (though even GAMI admits it will still cost more than 100LL). But it does also have a higher energy content per gallon than 100LL, which can either mean slightly more power or slightly more range, and no more lead fouling and longer oil change intervals, so if prices come down enough, it could balance out in the end.
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