I've become very frustrated with the "Premium" fuel situation in Southeast Michigan. First off, the cost differential between regular and premium is ridiculous. I'll give benefit of the doubt...maybe refiners sell much less of it these days and have fixed costs? Who knows. I'm not in the fuel business. My '97 F355 does not like sketchy gas, and summarily runs a bit crappy at idle and tip-in when I inadvertantly buy some. Big name, no-name; I've gotten both great and crappy gas at both. I want to buy some high-quality super-high-octane gas, from a place that sells a lot of it...racing fuel, avgas, whatever. 100? 106? 103.7925? Sounds good! Does anyone know where it's sold and is of good quality? How much does it cost? Thanks in advance. I live near Woodward and 14 Mile.