"Tom Conner" wrote

I believe that the government has exempted aviation fuel from EPA
jurisdiction and given the FAA control over what fuel is and is not used
in
aircraft. EPA can bitch and moan but cannot ban 100LL. However, the
market
can decide that the business case for 100LL is not there and decide to
stop
manufacturing it, and the FAA has no control over the market.

Add to that, that the gubermint can change their mind tomorrow, about
letting lead stay in Avgas.
--
Jim in NC