This is great news. From AVweb:
Shell Oil announced on Tuesday that is had developed an unleaded 100-octane piston engine fuel to replace 100LL and, presumably, the fuel will enter the FAA’s recently established fuel testing and certification process. In a press release, Shell said the fuel is a culmination of 10 years in R&D and initial testing has been done with two OEMs, Lycoming and Piper. Read More