There is no requirements for engines to change for unleaded gas. It is fully compatible with existing engines https://www.g100ul.com/ https://www.g100ul.com/

There is no requirements for engines to change for unleaded gas. It is fully compatible with existing engines https://www.g100ul.com/ https://www.g100ul.com/ >Will I have to modify my engine or aircraft to use G100UL avgas? >Other than placards, no modifications are required. A small placard is attached to the engine and "stick-on" placards are applied to refueling ports. In addition, there is a short POH supplement added to the AFMS. The engine change is shit pushed by the leaded-gas manufacturing lobby.