This might be handy, directory of stations selling Sunoco GT100 gas:
http://www.sunocoinc.com/site/Consumer/RaceFuels/260GT100Locations/
In California, where 100 octane is generally harder to find, apparently the Sunoco gas often sells through Unocal-76 stations. Unocal doesn't have this information on their website.
http://www.sunocoinc.com/Site/Consumer/RaceFuels/260GT100Locations/California.htm
http://www.sunocoinc.com/site/Consumer/RaceFuels/260GT100Locations/
In California, where 100 octane is generally harder to find, apparently the Sunoco gas often sells through Unocal-76 stations. Unocal doesn't have this information on their website.
http://www.sunocoinc.com/Site/Consumer/RaceFuels/260GT100Locations/California.htm