[bill1952]

Irrespective of this guy’s claims, if there is no lead, then we are going to need a lead substitute additive or retrofit the engines to work without lead.

[stubernx98]

Lead? What for. Current aircraft engines do not require lead other than as inhibitor. It is an OWT that it helps cool or lube the exhaust valves. Ran my Bonanza on auto fuel for 5 years and the only difference, was that my plugs weren't fouled with lead deposits.