Use of Unleaded Aviation Gasoline in Spark Ignition Engines originally designed for Leaded Fuels

The CAA are reminding the GA community that two CS-STAN (Standard Change) are already available which enable suitable aircraft to utilise unleaded aviation gasoline.

CS-SC202c and CS-SC203c can be used in conjunction with approvals from both airframe and engine manufacturers to utilise certain unleaded fuels and update manuals and placards as required.

AOPA have created a database of airframe and engine data to help owners to understand if their aircraft could be eligible (note this is for guidance only).

The CAA will be publishing a webpage with further guidance on General Aviation fuels in the coming weeks to help the community navigate the differences between similar fuels.