Yeah but your talking niche cases so I figured you were looking at it more broadly. The epa phasedown started in the early 70’s and the requirement of catalytic converters combined with leaded gasoline not being allowed in vehicles with catalytic converters essentially got rid of it despite it being able to be used in aviation and race cars and such along with legacy cars if you could find it.
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Yeah but your talking niche cases so I figured you were looking at it more broadly. The epa phasedown started in the early 70’s and the requirement of catalytic converters combined with leaded gasoline not being allowed in vehicles with catalytic converters essentially got rid of it despite it being able to be used in aviation and race cars and such along with legacy cars if you could find it.