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A comment on EPA moves towards banning leaded aviation gas. Parent comment

Re:EPA moves towards banning leaded aviation gas by elzbardico on Friday October 27, 2023 @12:37PM (#38040699)
Yes, I understand using leaded gas in older designs. But what was the manufacturer's too keep designing engines that require leaded gas even on fuel-injected, ECU equipped newer designs?

Not a rhetorical question, I am genuinely curious.

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Re:EPA moves towards banning leaded aviation gas by tass on Friday October 27, 2023 @12:45PM (#38040796)
New and old designs have been tested and can work with unleaded fuel. (Edit: there are surely some exceptions here, so I don’t mean this to be all encompassing)

New designs must work with leaded fuel since that is the fuel which is available - until avgas contains no lead this will continue to be the case.

Side note, most new planes are sold without an ecu.

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