It's been a while since I did a search for racing fuel, but it turns out I have more options than I thought. Amber Racing Services is nearby in Long Beach! http://www.amberracingservices.com/Products_VP.aspx This isn't nearly as convenient as the good old days when I could get unleaded race gas at the pump, but it might work in a pinch. I'll check prices, and will probably pick up a five gallon container to test. That's basically half a tank for our Fiesta ST! I can see mixing to get a reliable 93+ octane. Anyone happen to have a better or more convenient source in Long Beach, South Bay, or OC?