I'm a stude on the EV-97 Eurostar. It has a rotax 912 engine which runs on 95 octane unleaded. It will also run on AVGAS but this reduces the service interval. You can mix the fuels and there is no discernable difference in performance.
Lots of airfields which operate this type usually have a 'petrol run' arrangement to assist visiting aircraft to refuel.
It is interesting to chat with pilots flying the usual GA types and give them the stats:
Cruise at 80 mph = 9 litres per hour on (cheaper) unleaded
