thebluelightbulb -
I use (mostly) Chevron 91 Octane. However, I have a Hot-Air-Intake, so the premium fuel is insurance HAI (hot-air-intake => lean-burn => higher octane is better to avoid knocking/pinging). Here are threads on same :
http://ecomodder.com/forum/showthrea...mium-3143.html
http://ecomodder.com/forum/showthrea...ades-4925.html
CarloSW2