How about real 100 Octane Unleaded? Union 76 n PAsadena on Arroyo Parkway near the entrance of the 110 Freeway. Mix it wth 92 and (they have the Ratio-Octane Chart) and 95 is no sweat. It was so good for my 86 5KCSTQ, I saw 1.5 on the boost gauge (car was stock). Whiteman Airpark on OSborne in Pacoima has Avgas available for cars. Do not run it straight. Mix it with Auto Gas.