Only 30 years! I trained in a Cessna 152 that was certificated to run on high-octane unleaded auto gas. No modifications, the EAA just demonstrated that it wou

Only 30 years! I trained in a Cessna 152 that was certificated to run on high-octane unleaded auto gas. No modifications, the EAA just demonstrated that it would run fine like that. But my 172 had to use Aviation gasoline. Until now.