[AstralStorm]

The only worked because we had a ready replacement in place. (Different comparable gasoline additives, different comparable refrigerants, alternative motive gasses for pressured containers.)

And even today, leaded gas is still used for aircraft.

The problem with fossil fuels is we really do not quite have anything as energy dense and useful, not even lithium. (Which there is too little of, not to mention mining issues.)

As such, it will require a major change not just a tweak.